Document:

Exhibit 10.2

 

INVESTMENT
MANAGEMENT TRUST AGREEMENT

 

This Investment Management Trust Agreement
(this “Agreement”) is made effective as of January _, 2021, by and between OCA Acquisition Corp.,
a Delaware corporation (the “Company”), and Continental Stock Transfer & Trust Company, a New
York limited purpose trust company (the “Trustee”).

 

WHEREAS, the Company’s registration
statement on Form S-1, File Nos. 333-251617 (the “Registration Statement”) and prospectus (the “Prospectus”)
for the initial public offering of the Company’s units (the “Units”), each of which consists of
one share of the Company’s Class A common stock, par value $0.0001 per share (the “Common Stock”),
and one-half of one redeemable warrant, each whole warrant entitling the holder thereof to purchase one share of Common Stock (such
initial public offering hereinafter referred to as the “Offering”), has been declared effective as of
the date hereof by the U.S. Securities and Exchange Commission;

 

WHEREAS, the Company has entered into an
Underwriting Agreement (the “Underwriting Agreement”) with Stifel, Nicolaus & Company, Incorporated
and Nomura Securities International, Inc., as representatives (the “Representatives”) of the several
underwriters (the “Underwriters”) named therein;

 

WHEREAS, if a Business Combination (as defined
herein) is not consummated within the initial 18 month period following the closing of the Offering, upon the request of the Sponsor
(as defined below), the Company may extend such period by 6 months for up to a maximum of 24 months, subject to the Company’s
sponsor (the “Sponsor”) or its affiliates or permitted designees depositing $650,000 (or $747,500 if
the Underwriters’ over-allotment option is exercised in full) into the Trust Account no later than the 18 month anniversary
of the Offering (the “Extension Deadline”) for the six month extension (the “Extension”),
in exchange for which the Sponsor will receive a non-interest bearing, unsecured promissory note for each Extension payable upon
consummation of a Business Combination; and

 

WHEREAS, as described in the Prospectus,
$130,000,000 of the proceeds of the Offering and sale of the Private Placement Warrants (as defined in the Underwriting Agreement)
(or $149,500,000, if the Underwriters’ over-allotment option is exercised in full) and the proceeds from any loans in connection
with the Extension, if any, will be delivered to the Trustee to be deposited and held in a segregated trust account located at
all times in the United States (the “Trust Account”) for the benefit of the Company and the holders of
the Common Stock included in the Units issued in the Offering as hereinafter provided (the amount to be delivered to the Trustee
(and any interest subsequently earned thereon) is referred to herein as the “Property,” the stockholders
for whose benefit the Trustee shall hold the Property will be referred to as the “Public Stockholders,”
and the Public Stockholders and the Company will be referred to together as the “Beneficiaries”);

 

WHEREAS, pursuant to the Underwriting Agreement,
a portion of the Property equal to $4,550,000, or $5,232,500 if the Underwriters’ over-allotment option is exercised in full,
is attributable to deferred underwriting discounts and commissions that will be payable by the Company to the Underwriters upon
and concurrently with the consummation of the Business Combination (as defined below) (the “Deferred Discount”);
and

 

WHEREAS, the Company and the Trustee desire
to enter into this Agreement to set forth the terms and conditions pursuant to which the Trustee shall hold the Property.

 

NOW THEREFORE, IT IS AGREED:

 

1. Agreements
and Covenants of Trustee. The Trustee hereby agrees and covenants to:

 

(a) Hold
the Property in trust for the Beneficiaries in accordance with the terms of this Agreement in the Trust Account established by
the Trustee in the United States at J.P. Morgan Chase Bank, N.A., (or at another U.S.-chartered commercial bank with consolidated
assets of $100 billion or more) in the United States, maintained by the Trustee and at a brokerage institution selected by the
Trustee that is reasonably satisfactory to the Company;

 

(b) Manage,
supervise and administer the Trust Account subject to the terms and conditions set forth herein;

 

(c) In
a timely manner, upon the written instruction of the Company, invest and reinvest the Property solely in United States government
securities within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended, having a maturity of
185 days or less, or in money market funds meeting the conditions of paragraphs (d)(1), (d)(2), (d)(3) and (d)(4) of
Rule 2a-7 promulgated under the Investment Company Act of 1940, as amended (or any successor rule), which invest only in direct
U.S. government treasury obligations, as determined by the Company; it being understood that the Trust Account will earn no interest
while account funds are uninvested awaiting the Company’s instructions hereunder and the Trustee may earn bank credits or
other consideration;

 

     

    

    

 

(d) Collect
and receive, when due, all principal, interest or other income arising from the Property, which shall become part of the “Property,”
as such term is used herein;

 

(e) Promptly
notify the Company and the Representatives of all communications received by the Trustee with respect to any Property requiring
action by the Company;

 

(f) Supply
any necessary information or documents as may be requested by the Company (or its authorized agents) in connection with the Company’s
preparation of the tax returns relating to assets held in the Trust Account;

 

(g) Participate
in any plan or proceeding for protecting or enforcing any right or interest arising from the Property if, as and when instructed
by the Company to do so;

 

(h) Render
to the Company monthly written statements of the activities of, and amounts in, the Trust Account reflecting all receipts and disbursements
of the Trust Account;

 

(i) Commence
liquidation of the Trust Account only after and promptly after (x) receipt of, and only in accordance with, the terms of a
letter from the Company (“Termination Letter”) in a form substantially similar to that attached hereto
as either Exhibit A or Exhibit B, as applicable, signed on behalf of the Company by its Chief Executive Officer, Chief
Financial Officer, President, Executive Vice President, Vice President, Secretary or Chairman of the board of directors of the
Company (the “Board”) or other authorized officer of the Company, and complete the liquidation of the
Trust Account and distribute the Property in the Trust Account, including interest not previously released to the Company to pay
its franchise and income taxes (less up to $100,000 of interest that may be released to the Company to pay dissolution expenses),
only as directed in the Termination Letter and the other documents referred to therein, or (y) upon the date which is, the
later of (1) 18 months after the closing of the Offering, (2) such later date upon the Extension, effectuated pursuant to
the terms hereof, and (3) such later date as may be approved by the Company’s stockholders in accordance with the Company’s
amended and restated certificate of incorporation if a Termination Letter has not been received by the Trustee prior to such date,
in which case the Trust Account shall be liquidated in accordance with the procedures set forth in the Termination Letter attached
as Exhibit B and the Property in the Trust Account, including interest not previously released to the Company to pay its franchise
and income taxes (less up to $100,000 of interest that may be released to the Company to pay dissolution expenses) shall be distributed
to the Public Stockholders of record as of such date;

 

(j) Upon
written request from the Company, which may be given from time to time in a form substantially similar to that attached hereto
as Exhibit C, withdraw from the Trust Account and distribute to the Company the amount of interest earned on the Property
requested by the Company to cover any tax obligation, including any franchise tax obligations, owed by the Company as a result
of assets of the Company or interest or other income earned on the Property, which amount shall be delivered directly to the Company
by electronic funds transfer or other method of prompt payment, and the Company shall forward such payment to the relevant taxing
authority, as applicable; provided, however, that to the extent there is not sufficient cash in the Trust Account to pay such tax
obligation, the Trustee shall liquidate such assets held in the Trust Account as shall be designated by the Company in writing
to make such distribution, so long as there is no reduction in the principal amount initially deposited in the Trust Account; provided,
further, that if the tax to be paid is a franchise tax, the written request by the Company to make such distribution shall be accompanied
by a copy of the franchise tax bill from the State of Delaware for the Company (it being acknowledged and agreed that any such
amount in excess of interest income earned on the Property shall not be payable from the Trust Account). The written request of
the Company referenced above shall constitute presumptive evidence that the Company is entitled to said funds, and the Trustee
shall have no responsibility to look beyond said request;

 

(k) Upon
written request from the Company, which may be given from time to time in a form substantially similar to that attached hereto
as Exhibit D, the Trustee shall distribute on behalf of the Company the amount requested by the Company to be used to redeem
shares of Common Stock from Public Stockholders properly submitted in connection with a stockholder vote to approve an amendment
to the Company’s amended and restated certificate of incorporation to (i) modify the substance or timing of the Company’s
obligation to redeem 100% of the shares of Common Stock included in the Units sold in the Offering if the Company does not complete
a Business Combination within the time period set forth in the Company’s amended and restated certificate of incorporation
or (ii) with respect to any other provision relating to stockholders’ rights or pre-initial Business Combination activity;

 

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(l) Not
make any withdrawals or distributions from the Trust Account other than pursuant to Section 1(i), (j) or (k) above;
and

(m) Upon receipt of an extension letter
(“Extension Letter”) substantially similar to Exhibit E hereto at least five business days prior to the
Extension Deadline, signed on behalf of the Company by an executive officer, and receipt of the dollar amount specified in the
Extension Letter on or prior to the Extension Deadline, follow the instructions set forth in the Extension Letter.

 

2. Agreements
and Covenants of the Company. The Company hereby agrees and covenants to:

 

(a) Give
all instructions to the Trustee hereunder in writing, signed by the Company’s Chairman of the Board, Chief Executive Officer,
Chief Financial Officer, President, Executive Vice President, Vice President or Secretary. In addition, except with respect to
its duties under Sections 1(i), 1(j) and 1(k) hereof, the Trustee shall be entitled to rely on, and shall be protected
in relying on, any verbal or telephonic advice or instruction which it, in good faith and with reasonable care, believes to be
given by any one of the persons authorized above to give written instructions, provided that the Company shall promptly confirm
such instructions in writing;

 

(b) Subject
to Section 4 hereof, hold the Trustee harmless and indemnify the Trustee from and against any and all expenses, including
reasonable counsel fees and disbursements, or losses suffered by the Trustee in connection with any action taken by it hereunder
and in connection with any action, suit or other proceeding brought against the Trustee involving any claim, or in connection with
any claim or demand, which in any way arises out of or relates to this Agreement, the services of the Trustee hereunder, or the
Property or any interest earned on the Property, except for expenses and losses resulting from the Trustee’s gross negligence,
fraud or willful misconduct. Promptly after the receipt by the Trustee of notice of demand or claim or the commencement of any
action, suit or proceeding, pursuant to which the Trustee intends to seek indemnification under this Section 2(b), it shall
notify the Company in writing of such claim (hereinafter referred to as the “Indemnified Claim”). The
Trustee shall have the right to conduct and manage the defense against such Indemnified Claim; provided that the Trustee shall
obtain the consent of the Company with respect to the selection of counsel, which consent shall not be unreasonably withheld. The
Trustee may not agree to settle any Indemnified Claim without the prior written consent of the Company, which such consent shall
not be unreasonably withheld. The Company may participate in such action with its own counsel;

 

(c) Pay
the Trustee the fees set forth on Schedule A hereto, including an initial acceptance fee, annual administration fee, and transaction
processing fee which fees shall be subject to modification by the parties from time to time. It is expressly understood that the
Property shall not be used to pay such fees unless and until the closing of the Business Combination (defined below). The Company
shall pay the Trustee the initial acceptance fee and the first annual administration fee at the consummation of the Offering. The
Company shall not be responsible for any other fees or charges of the Trustee except as set forth in this Section 2(c), Schedule A
and as may be provided in Section 2(b) hereof;

 

(d) In
connection with any vote of the Company’s stockholders regarding a merger, capital stock exchange, asset acquisition, stock
purchase, reorganization or similar business combination involving the Company and one or more businesses (the “Business
Combination”), provide to the Trustee an affidavit or certificate of the inspector of elections for the stockholder
meeting verifying the vote of such stockholders regarding such Business Combination;

 

(e) Provide
the Representatives with a copy of any Termination Letter(s) and/or any other correspondence that is sent to the Trustee with
respect to any proposed withdrawal from the Trust Account promptly after it issues the same;

 

(f) Unless
otherwise agreed among the Company and the Representatives, ensure that any Instruction Letter (as defined in Exhibit A) delivered
in connection with a Termination Letter in the form of Exhibit A expressly provides that the Deferred Discount is paid directly
to the account or accounts directed by the Representatives on behalf of the Underwriters prior to any transfer of the funds held
in the Trust Account to the Company or any other person;

 

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(g) Instruct
the Trustee to make only those distributions that are permitted under this Agreement, and refrain from instructing the Trustee
to make any distributions that are not permitted under this Agreement;

 

(h) Within
five (5) business days after the Representatives, on behalf of the Underwriters, exercise the over-allotment option (or any
unexercised portion thereof) or such over-allotment option expires, provide the Trustee with a notice in writing of the total amount
of the Deferred Discount, which shall in no event be less than $4,550,000;

 

(i) If
applicable, issue a press release at least three days prior to the Extension Deadline announcing that, at least five days prior
to the Extension Deadline, the Company received notice from the Sponsor that the Sponsor intends to deposit funds into the Trust
Account for extending the Extension Deadline; and

 

(j)  Promptly
following the Extension Deadline, disclose whether or not the deadline for the Company to consummate a Business Combination has
been extended.

 

 

3. Limitations
of Liability. The Trustee shall have no responsibility or liability to:

 

(a) Imply
obligations, perform duties, inquire or otherwise be subject to the provisions of any agreement or document other than this Agreement
and that which is expressly set forth herein;

 

(b) Take
any action with respect to the Property, other than as directed in Section 1 hereof, and the Trustee shall have no liability
to any third party except for liability arising out of the Trustee’s gross negligence, fraud or willful misconduct;

 

(c) Institute
any proceeding for the collection of any principal and income arising from, or institute, appear in or defend any proceeding of
any kind with respect to, any of the Property unless and until it shall have received instructions from the Company given as provided
herein to do so and the Company shall have advanced or guaranteed to it funds sufficient to pay any expenses incident thereto;

 

(d) Refund
any depreciation in principal of any Property;

 

(e) Assume
that the authority of any person designated by the Company to give instructions hereunder shall not be continuing unless provided
otherwise in such designation, or unless the Company shall have delivered a written revocation of such authority to the Trustee;

 

(f) The
other parties hereto or to anyone else for any action taken or omitted by it, or any action suffered by it to be taken or omitted,
in good faith and in the Trustee’s best judgment, except for the Trustee’s gross negligence, fraud or willful misconduct.
The Trustee may rely conclusively and shall be protected in acting upon any order, notice, demand, certificate, opinion or advice
of counsel (including counsel chosen by the Trustee, which counsel may be the Company’s counsel), statement, instrument,
report or other paper or document (not only as to its due execution and the validity and effectiveness of its provisions, but also
as to the truth and acceptability of any information therein contained) which the Trustee believes, in good faith and with reasonable
care, to be genuine and to be signed or presented by the proper person or persons. The Trustee shall not be bound by any notice
or demand, or any waiver, modification, termination or rescission of this Agreement or any of the terms hereof, unless evidenced
by a written instrument delivered to the Trustee, signed by the proper party or parties and, if the duties or rights of the Trustee
are affected, unless it shall give its prior written consent thereto;

 

(g) Verify
the accuracy of the information contained in the Registration Statement;

 

(h) Provide
any assurance that any Business Combination entered into by the Company or any other action taken by the Company is as contemplated
by the Registration Statement;

 

(i) File
information returns with respect to the Trust Account with any local, state or federal taxing authority or provide periodic written
statements to the Company documenting the taxes payable by the Company, if any, relating to any interest income earned on the Property;

 

(j) Prepare,
execute and file tax reports, income or other tax returns and pay any taxes with respect to any income generated by, and activities
relating to, the Trust Account, regardless of whether such tax is payable by the Trust Account or the Company, including, but not
limited to, franchise and income tax obligations, except pursuant to Section 1(j) hereof; or

 

(k) Verify
calculations, qualify or otherwise approve the Company’s written requests for distributions pursuant to Sections 1(i),
1(j) or 1(k) hereof.

 

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4. Trust
Account Waiver. The Trustee has no right of set-off or any right, title, interest or claim of any kind (“Claim”)
to, or to any monies in, the Trust Account, and hereby irrevocably waives any Claim to, or to any monies in, the Trust Account
that it may have now or in the future. In the event the Trustee has any Claim against the Company under this Agreement, including,
without limitation, under Section 2(b) or Section 2(c) hereof, the Trustee shall pursue such Claim solely against
the Company and its assets outside the Trust Account and not against the Property or any monies in the Trust Account.

 

5. Termination.
This Agreement shall terminate as follows:

 

(a) If
the Trustee gives written notice to the Company that it desires to resign under this Agreement, the Company shall use its reasonable
efforts to locate a successor trustee, pending which the Trustee shall continue to act in accordance with this Agreement. At such
time that the Company notifies the Trustee that a successor trustee has been appointed by the Company and has agreed to become
subject to the terms of this Agreement, the Trustee shall transfer the management of the Trust Account to the successor trustee,
including but not limited to the transfer of copies of the reports and statements relating to the Trust Account, whereupon this
Agreement shall terminate; provided, however, that in the event that the Company does not locate a successor trustee within ninety
(90) days of receipt of the resignation notice from the Trustee, the Trustee may submit an application to have the Property deposited
with any court in the State of New York or with the United States District Court for the Southern District of New York and upon
such deposit, the Trustee shall be immune from any liability whatsoever; or

 

(b) At
such time that the Trustee has completed the liquidation of the Trust Account and its obligations in accordance with the provisions
of Section 1(i) hereof (which section may not be amended under any circumstances) and distributed the Property in accordance
with the provisions of the Termination Letter, this Agreement shall terminate except with respect to Section 2(b) and
Section 4.

 

6. Miscellaneous.

 

(a) The
Company and the Trustee each acknowledge that the Trustee will follow the security procedures set forth below with respect to funds
transferred from the Trust Account. The Company and the Trustee will each restrict access to confidential information relating
to such security procedures to authorized persons. Each party must notify the other party immediately if it has reason to believe
unauthorized persons may have obtained access to such confidential information, or of any change in its authorized personnel. In
executing funds transfers, the Trustee shall rely upon all information supplied to it by the Company, including, account names,
account numbers, and all other identifying information relating to a Beneficiary, Beneficiary’s bank or intermediary bank.
Except for any liability arising out of the Trustee’s gross negligence, fraud or willful misconduct, the Trustee shall not
be liable for any loss, liability or expense resulting from any error in the information or transmission of the funds.

 

(b) This
Agreement shall be governed by and construed and enforced in accordance with the laws of the State of New York, without giving
effect to conflicts of law principles that would result in the application of the substantive laws of another jurisdiction. This
Agreement may be executed in several original or facsimile counterparts, each one of which shall constitute an original, and together
shall constitute but one instrument.

 

(c) This
Agreement contains the entire agreement and understanding of the parties hereto with respect to the subject matter hereof. This
Agreement or any provision hereof may only be changed, amended or modified (other than to correct a typographical error) by a writing
signed by each of the parties hereto.

 

(d) This
Agreement or any provision hereof may only be changed, amended or modified pursuant to Section 6(c) hereof with the Consent
of the Stockholders. For purposes of this Section 6(d), the “Consent of the Stockholders” means
(i) receipt by the Trustee of a certificate from the inspector of elections of the stockholder meeting certifying that the
Company’s stockholders of record as of a record date established in accordance with Section 213(a) of the Delaware
General Corporation Law, as amended (or any successor rule), who hold sixty-five percent (65%) or more of all then outstanding
shares of the Common Stock and Class B common stock, par value $0.0001 per share, of the Company voting together as a single
class, have voted in favor of such change, amendment or modification, or (ii) the Company’s stockholders of record as
of the record date who hold sixty-five percent (65%) or more of all then outstanding shares of the Common Stock and Class B
common stock, par value $0.0001 per share, of the Company voting together as a single class, have delivered to the Trustee a signed
writing approving such change, amendment or modification. No such amendment will affect any Public Stockholder who has otherwise
indicated his, her or its election to redeem his, her or its shares of Common Stock in connection with a stockholder vote sought
to amend this Agreement, including a corresponding change to the Company’s amended and restated certificate of incorporation.
Except for any liability arising out of the Trustee’s gross negligence, fraud or willful misconduct, the Trustee may rely
conclusively on the certification from the inspector or elections referenced above and shall be relieved of all liability to any
party for executing the proposed amendment in reliance thereon.

 

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(e) The
parties hereto consent to the jurisdiction and venue of any state or federal court located in the City of New York, State of New
York, for purposes of resolving any disputes hereunder. AS TO ANY CLAIM, CROSS-CLAIM OR COUNTERCLAIM IN ANY WAY RELATING TO THIS
AGREEMENT, EACH PARTY WAIVES THE RIGHT TO TRIAL BY JURY.

 

(f) Any
notice, consent or request to be given in connection with any of the terms or provisions of this Agreement shall be in writing
and shall be sent by express mail or similar private courier service, by certified mail (return receipt requested), by hand delivery
or by electronic mail:

 

if to the Trustee,
to:

 

Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, NY 10004

Attn:   Francis Wolf and Celeste Gonzalez

Email:  fwolf@continentalstock.com

 cgonzalez@continentalstock.com

 

if to the Company,
to:

 

OCA Acquisition Corp.

1345 Avenue of the Americas, 33rd Floor

New York, New York 10105

Attn:   David Shen

Email:  DShen@olympuscap.com

 

in each case, with
copies to:

 

Ellenoff Grossman & Schole LLP

1345 Avenue of the Americas

New York, New York 10105

Attn:    Stuart Neuhauser, Esq.

Email:  sneuhauser@egsllp.com

 

and

 

Stifel, Nicolaus & Company, Incorporated

 

Attn:  

Email:  

 

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and

 

Nomura Securities International, Inc.

 

Attn:

Email:  

 

and

 

DLA Piper LLP (US)

1251 Avenue of the Americas

New York, New York 10020

Attn:   Stephen Alicanti

Email:  Stephen.Alicanti@us.dlapiper.com

 

(g) Each
of the Company and the Trustee hereby represents that it has the full right and power and has been duly authorized to enter into
this Agreement and to perform its respective obligations as contemplated hereunder. The Trustee acknowledges and agrees that it
shall not make any claims or proceed against the Trust Account, including by way of set-off, and shall not be entitled to any funds
in the Trust Account under any circumstance.

 

(h) This
Agreement is the joint product of the Trustee and the Company and each provision hereof has been subject to the mutual consultation,
negotiation and agreement of such parties and shall not be construed for or against any party hereto.

 

(i) This
Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts
shall together constitute one and the same instrument. Delivery of a signed counterpart of this Agreement by facsimile or electronic
transmission shall constitute valid and sufficient delivery thereof.

 

(j) Each
of the Company and the Trustee hereby acknowledges and agrees that the Representatives on behalf of the Underwriters are third
party beneficiaries of this Agreement.

 

(k) Except
as specified herein, no party to this Agreement may assign its rights or delegate its obligations hereunder to any other person
or entity.

 

[Signature Page Follows]

 

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IN WITNESS WHEREOF, the parties have
duly executed this Investment Management Trust Agreement as of the date first written above.

 

	 	CONTINENTAL STOCK TRANSFER &
	 	TRUST COMPANY, as Trustee
	 	 
	 	By:	 
	 	Name: 	Francis Wolf
	 	Title:	Vice President
	 	 	 
	 	 	 
	 	oca Acquisition Corp.
	 	 
	 	By:	 
	 	Name:	David Shen
	 	Title:	Chief Executive Officer

 

[Signature Page to Investment Management
Trust Agreement]

 

    

    

    

 

SCHEDULE
A

 

	Fee Item	 	Time and method of payment	 	Amount	 
	Initial set-up fee	 	Initial closing of Offering by wire transfer	 	$	3,500.00	 
	Trustee administration fee	 	First year, initial closing of Offering by wire transfer, thereafter on the anniversary of the effective date of the Offering by wire transfer or check	 	$	10,000.00	 
	Transaction processing fee for disbursements to Company under Sections 1(i) and 1(j)	 	Billed to Company following disbursement made to Company under Section 1	 	$	250.00	 
	Paying Agent services as required pursuant to Sections 1(i) and 1(k)	 	Billed to Company upon delivery of service pursuant to Sections 1(i) and 1(k)	 	 	Prevailing rates	 

 

    

    

    

 

EXHIBIT A

 

[Letterhead of Company]

 

[Insert date]

 

Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

 

Re:   Trust
Account - Termination Letter

 

Mr. Wolf and Ms. Gonzalez:

 

Pursuant to Section 1(i) of the
Investment Management Trust Agreement between OCA Acquisition Corp. (the “Company”) and Continental Stock
Transfer & Trust Company (the “Trustee”), dated as of _________, 2021 (the “Trust
Agreement”), this is to advise you that the Company has entered into an agreement with [__________] (the “Target
Business”) to consummate a business combination with the Target Business (the “Business Combination”)
on or about [insert date]. The Company shall notify you at least seventy-two (72) hours in advance (or such shorter time as you
may agree) of the actual date of the consummation of the Business Combination (the “Consummation Date”).
Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

 

In accordance with the terms of the Trust
Agreement, we hereby authorize you to commence to liquidate all of the assets of the Trust Account and transfer the proceeds to
a segregated account held by you on behalf of the Beneficiaries to the effect that, on the Consummation Date, all of the funds
held in the Trust Operating Account at JP Morgan Chase Bank, N.A. will be immediately available for transfer to the account or
accounts that the Company shall direct on the Consummation Date (including as directed to it by the Representatives on behalf of
the Underwriters (with respect to the Deferred Discount)). It is acknowledged and agreed that while the funds are on deposit in
the trust operating account at J.P. Morgan Chase Bank, N.A. awaiting distribution, the Company will not earn any interest or dividends.

 

On the Consummation Date (i) counsel
for the Company shall deliver to you written notification that the Business Combination has been consummated, or will be consummated
substantially concurrently with your transfer of funds to the accounts as directed by the Company (the “Notification”)
and (ii) the Company shall deliver to you (a) a certificate of the Chief Executive Officer, which verifies that the Business
Combination has been approved by a vote of the Company’s stockholders, if a vote is held and (b) a written instruction
signed by the Company with respect to the transfer of the funds held in the Trust Account, including payment of amounts owed to
public stockholders who have properly exercised their redemption rights and payment of the Deferred Discount to the Representatives
from the Trust Account (the “Instruction Letter”). You are hereby directed and authorized to transfer
the funds held in the Trust Account immediately upon your receipt of the Notification and the Instruction Letter, in accordance
with the terms of the Instruction Letter. In the event that certain deposits held in the Trust Account may not be liquidated by
the Consummation Date without penalty, you will notify the Company in writing of the same and the Company shall direct you as to
whether such funds should remain in the Trust Account and be distributed after the Consummation Date to the Company. Upon the distribution
of all the funds, net of any payments necessary for reasonable unreimbursed expenses related to liquidating the Trust Account,
your obligations under the Trust Agreement shall be terminated.

 

In the event that the Business Combination
is not consummated on the Consummation Date described in the notice thereof and we have not notified you on or before the original
Consummation Date of a new Consummation Date, then upon receipt by the Trustee of written instructions from the Company, the funds
held in the Trust Account shall be reinvested as provided in Section 1(c) of the Trust Agreement on the business day
immediately following the Consummation Date as set forth in such notice as soon thereafter as possible.

 

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	 	 	Very truly yours,
	 	 	 
	 	 	OCA Acquisition Corp.
	 	 	 
	 	 	 
	 	 	By:	           
	 	 	Name:	 
	 	 	Title:	 
	cc:	Stifel, Nicolaus & Company, Incorporated

Nomura Securities International, Inc.	 

 

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EXHIBIT B

 

[Letterhead of Company]

 

[Insert date]

 

Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

 

Re:   Trust
Account - Termination Letter

 

Mr. Wolf and Ms. Gonzalez:

 

Pursuant to Section 1(i) of the
Investment Management Trust Agreement between OCA Acquisition Corp. (the “Company”) and Continental Stock
Transfer & Trust Company (the “Trustee”), dated as of _________, 2021 (the “Trust
Agreement”), this is to advise you that the Company did not effect a business combination with a Target Business
(the “Business Combination”) within the time frame specified in the Company’s amended and restated
certificate of incorporation, as described in the Company’s Prospectus relating to the Offering. Capitalized terms used but
not defined herein shall have the meanings set forth in the Trust Agreement.

 

In accordance with the terms of the Trust
Agreement, we hereby authorize you to liquidate all of the assets in the Trust Account and transfer the total proceeds into a segregated
account held by you on behalf of the Beneficiaries to await distribution to the Public Stockholders. The Company has selected [_________,
20__]1 as the effective date for the purpose of determining when the Public Stockholders will be entitled to receive
their share of the liquidation proceeds. You agree to be the Paying Agent of record and, in your separate capacity as Paying Agent,
agree to distribute said funds directly to the Company’s Public Stockholders in accordance with the terms of the Trust Agreement
and the Company’s amended and restated certificate of incorporation. Upon the distribution of all the funds, net of any payments
necessary for reasonable unreimbursed expenses related to liquidating the Trust Account, your obligations under the Trust Agreement
shall be terminated, except to the extent otherwise provided in Section 1(i) of the Trust Agreement.

 

	 	 	Very truly yours,
	 	 	 
	 	 	OCA Acquisition Corp.
	 	 	 
	 	 	 
	 	 	By:	                 
	 	 	Name:	 
	 	 	Title:	 
	cc:	Stifel, Nicolaus & Company, Incorporated

Nomura Securities International, Inc.	 

 

		1	18 months from the closing of the Offering or at a later
date upon Extensions, if any, effectuated pursuant to Trust Agreement.

 

    B-1

    

    

 

EXHIBIT C

 

[Letterhead of Company]

 

[Insert date]

 

Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

 

Re:   Trust
Account - Withdrawal Instruction

 

Mr. Wolf and Ms. Gonzalez:

 

Pursuant to Section 1(j) of the
Investment Management Trust Agreement between OCA Acquisition Corp. (the “Company”) and Continental Stock
Transfer & Trust Company (the “Trustee”), dated as of _________, 2021 (the “Trust
Agreement”), the Company hereby requests that you deliver to the Company $[_____] of the interest income earned on
the Property as of the date hereof. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust
Agreement.

 

The Company needs such funds [to pay for
the tax obligations as set forth on the attached tax return or tax statement]. In accordance with the terms of the Trust Agreement,
you are hereby directed and authorized to transfer (via wire transfer) such funds promptly upon your receipt of this letter to
the Company’s operating account at:

 

[WIRE
INSTRUCTION INFORMATION]

 

	 	 	Very truly yours,
	 	 	 
	 	 	OCA Acquisition Corp.
	 	 	 
	 	 	 
	 	 	By:	            
	 	 	Name:	 
	 	 	Title:	 
	cc:	Stifel, Nicolaus & Company, Incorporated

Nomura Securities International, Inc.	 

 

    C-1

    

    

 

EXHIBIT D

 

[Letterhead of Company]

 

[Insert date]

 

Continental Stock Transfer & Trust Company

1 State Street, 30th Floor

New York, New York 10004

Attn: Francis Wolf and Celeste Gonzalez

 

Re:   Trust
Account - Stockholder Redemption Withdrawal Instruction

 

Mr. Wolf and Ms. Gonzalez:

 

Pursuant to Section 1(k) of the
Investment Management Trust Agreement between OCA Acquisition Corp. (the “Company”) and Continental Stock
Transfer & Trust Company (the “Trustee”), dated as of _________, 2021 (the “Trust
Agreement”), the Company hereby requests that you deliver to the redeeming Public Stockholders of the Company $[_____]
of the principal and interest income earned on the Property as of the date hereof to a segregated account held by you on behalf
of the Beneficiaries for distribution to the Public Stockholders who have requested redemption of their shares of Common Stock.
Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

 

The Company needs such funds to pay its
Public Stockholders who have properly elected to have their shares of Common Stock redeemed by the Company in connection with a
stockholder vote to approve an amendment to the Company’s amended and restated certificate of incorporation to (i) modify
the substance or timing of the Company’s obligation to redeem 100% of the shares of Common Stock included in the Units sold
in the Offering if the Company does not complete a Business Combination within the time period set forth in the Company’s
amended and restated certificate of incorporation or (ii) with respect to any other provision relating to stockholders’
rights or pre-initial Business Combination activity. As such, you are hereby directed and authorized to transfer (via wire transfer)
such funds promptly upon your receipt of this letter.

 

	 	 	Very truly yours,
	 	 	 
	 	 	OCA Acquisition Corp.
	 	 	 
	 	 	 
	 	 	By:	           
	 	 	Name:	 
	 	 	Title:	 
	cc:	Stifel, Nicolaus & Company, Incorporated

Nomura Securities International, Inc.	 

 

    D-1

    

    

 

EXHIBIT E

 

[Letterhead
of Company]

 

[Insert date]

 

Continental Stock Transfer & Trust
Company

1 State Street, 30th Floor

New York, New York 10004

Attn.

 

	 	Re:	Trust Account No. [  ] Extension Letter

 

Gentlemen:

 

Pursuant to Section
1(m) of the Investment Management Trust Agreement between OCA Acquisition Corp. (“Company”) and Continental
Stock Transfer & Trust Company, dated as of [  ], 2021 (“Trust
Agreement”), this is to advise you that the Company is extending the time available to consummate a Business Combination
for an additional six (6) months, from _______ to _________ (the “Extension”).

 

This Extension
Letter shall serve as the notice required with respect to the Extension prior to the Applicable Deadline. Capitalized words used
herein and not otherwise defined shall have the meanings ascribed to them in the Trust Agreement.

 

In accordance with
the terms of the Trust Agreement, we hereby authorize you to deposit $650,000 [(or $747,500 if the underwriters’ over-allotment
option was exercised in full)], which will be wired to you, into the Trust Account investments upon receipt.

 

	 	CF Finance Acquisition Corp. III
	 	 	 
	 	By:	 
	 	 	Name:
	 	 	Title:

 

	cc:	Stifel, Nicolaus & Company, Incorporated

Nomura Securities International, Inc.

 

 

E-1Exhibit 10.4

 

WARRANT
PURCHASE AGREEMENT

 

THIS WARRANT PURCHASE AGREEMENT (as it may
from time to time be amended, this “Agreement”), dated as of January __, 2021, is entered into by and among
OCA Acquistion Corp., a Delaware corporation (the “Company”), and OCA Acquisition Holdings LLC, a Delaware limited
liability company (the “Purchaser”).

 

WHEREAS, the Company intends to consummate
an initial public offering of the Company’s units (the “Public Offering”), each unit consisting of one
share of Class A common stock of the Company, par value $0.0001 per share (each, a “Share”), and one-half
of one redeemable warrant, each whole warrant entitling the holder to purchase one Share at an exercise price of $11.50 per Share,
as set forth in the Company’s Registration Statement on Form S-1, filed with the U.S. Securities and Exchange Commission
(the “SEC”), File Number 333-251617 (the “Registration Statement”), under the Securities
Act of 1933, as amended (the “Securities Act”).

 

WHEREAS, the Purchaser has agreed to purchase,
at a price of $1.00 per warrant, an aggregate of 6,375,000 warrants (and up to 7,057,500 additional warrants if the underwriters
in the Public Offering exercise their over-allotment option in full) (the “Private Placement Warrants”), each
Private Placement Warrant entitling the holder to purchase one Share at an exercise price of $11.50 per Share.

 

NOW THEREFORE, in consideration of the mutual
promises contained in this Agreement and other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties to this Agreement hereby, intending legally to be bound, agree as follows:

 

AGREEMENT

 

Section 1. Authorization, Purchase
and Sale; Terms of the Private Placement Warrants.

 

A. Authorization of the Private
Placement Warrants. The Company has duly authorized the issuance and sale of the Private Placement Warrants to the Purchaser.

 

B. Purchase and Sale of the
Private Placement Warrants.

 

(i) On the date of the consummation
of the Public Offering (the “IPO Closing Date”), the Company shall issue and sell to the Purchaser, and the
Purchaser shall purchase from the Company, 6,375,000 Private Placement Warrants at a price of $1.00 per warrant for an aggregate
purchase price of $6,375,000 (the “Purchase Price”). The Purchaser shall pay the Purchase Price by wire transfer
of immediately available funds in accordance with the Company’s wiring instructions, at least one (1) business day prior
to the IPO Closing Date. On the IPO Closing Date, upon the payment by the Purchaser of the Purchase Price, by wire transfer of
immediately available funds to the Company, the Company, at its option, shall deliver a certificate evidencing the Private Placement
Warrants purchased on such date duly registered in the Purchaser’s name to the Purchaser or effect such delivery in book-entry
form.

 

(ii) On the date of the closing
of the over-allotment option, if any, in connection with the Public Offering or on such earlier time and date as may be mutually
agreed by the Purchaser and the Company (each such date, an “Over-allotment Closing Date”, and each Over-allotment
Closing Date (if any) and the IPO Closing Date, a “Closing Date”), the Company shall issue and sell to the Purchaser,
and the Purchaser shall purchase from the Company, up to 682,500 Private Placement Warrants (or, to the extent the over-allotment
option is not exercised in full, a lesser number of Private Placement Warrants in proportion to portion of the over-allotment option
that is exercised) at a price of $1.00 per warrant for an aggregate purchase price of up to $682,500 (the “Over-allotment
Purchase Price”). The Purchaser shall pay the Over-allotment Purchase Price by wire transfer of immediately available
funds in accordance with the Company’s wiring instructions, at least one (1) business day prior to the Over-allotment
Closing Date. On the Over-allotment Closing Date, upon the payment by the Purchaser of the Over-allotment Purchase Price, by wire
transfer of immediately available funds to the Company, the Company, at its option, shall deliver a certificate evidencing the
Private Placement Warrants purchased on such date duly registered in the Purchaser’s name to the Purchaser or effect such
delivery in book-entry form.

 

     

     

    

 

C. Terms of the Private Placement
Warrants.

 

(i) Each Private Placement
Warrant shall have the terms set forth in a Warrant Agreement to be entered into by the Company and a warrant agent, in connection
with the Public Offering (the “Warrant Agreement”), and shall be subject to the terms of a letter agreement
to be entered into by the Company, the Purchaser and the other parties thereto, in connection with the Public Offering.

 

(ii) At the time of, or prior
to, the IPO Closing Date, the Company and the Purchaser shall enter into a registration and stockholder rights agreement (the “Registration
and Stockholder Rights Agreement”) pursuant to which the Company will grant certain registration rights to the Purchaser
relating to the Private Placement Warrants and the Shares underlying the Private Placement Warrants.

 

Section 2. Representations and Warranties
of the Company.

 

As a material inducement to the Purchaser
to enter into this Agreement and purchase the Private Placement Warrants, the Company hereby represents and warrants to the Purchaser
(which representations and warranties shall survive each Closing Date) that:

 

A. Incorporation and Corporate
Power. The Company is a corporation duly incorporated, validly existing and in good standing under the laws of the State of
Delaware and is qualified to do business in every jurisdiction in which the failure to so qualify would reasonably be expected
to have a material adverse effect on the financial condition, operating results or assets of the Company. The Company possesses
all requisite corporate power and authority necessary to carry out the transactions contemplated by this Agreement and the Warrant
Agreement.

 

B. Authorization; No Breach.

 

(i) The execution, delivery
and performance of this Agreement and the Private Placement Warrants have been duly authorized by the Company as of each Closing
Date. This Agreement constitutes the valid and binding obligation of the Company, enforceable in accordance with its terms, subject
to bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other laws of general applicability relating to
or affecting creditors’ rights and to general equitable principles (whether considered in a proceeding in equity or law).
Upon issuance in accordance with, and payment pursuant to, the terms of the Warrant Agreement and this Agreement, the Private Placement
Warrants will constitute valid and binding obligations of the Company, enforceable in accordance with their terms as of each Closing
Date.

 

(ii) The execution and delivery
by the Company of this Agreement and the Private Placement Warrants, the issuance and sale of the Private Placement Warrants, the
issuance of the Shares upon exercise of the Private Placement Warrants and the fulfillment of and compliance with the respective
terms hereof and thereof by the Company, do not and will not as of each Closing Date (a) conflict with or result in a breach
of the terms, conditions or provisions of, (b) constitute a default under, (c) result in the creation of any lien, security
interest, charge or encumbrance upon the Company’s capital stock or assets under, (d) result in a violation of, or (e) require
any authorization, consent, approval, exemption or other action by or notice or declaration to, or filing with, any court or administrative
or governmental body or agency pursuant to the certificate of incorporation or the bylaws of the Company (in effect on the date
hereof or as may be amended prior to completion of the Public Offering) or any material law, statute, rule or regulation to
which the Company is subject, or any agreement, order, judgment or decree to which the Company is subject, except for any filings
required after the date hereof under federal or state securities laws.

 

    2

     

    

 

C. Title to Securities.
Upon issuance in accordance with, and payment pursuant to, the terms hereof and the Warrant Agreement, the Shares issuable upon
exercise of the Private Placement Warrants will be duly and validly issued, fully paid and nonassessable. Upon issuance in accordance
with, and payment pursuant to, the terms hereof and the Warrant Agreement, the Purchaser will have good title to the Private Placement
Warrants purchased by it and the Shares issuable upon exercise of such Private Placement Warrants, free and clear of all liens,
claims and encumbrances of any kind, other than (i) transfer restrictions hereunder and under the other agreements contemplated
hereby, (ii) transfer restrictions under federal and state securities laws, and (iii) liens, claims or encumbrances imposed
due to the actions of the Purchaser.

 

D. Governmental Consents.
No permit, consent, approval or authorization of, or declaration to or filing with, any governmental authority is required in connection
with the execution, delivery and performance by the Company of this Agreement or the consummation by the Company of any other transactions
contemplated hereby.

 

E. Regulation D Qualification.
Neither the Company nor, to its actual knowledge, any of its affiliates, members, officers, directors or beneficial shareholders
of 20% or more of its outstanding securities, has experienced a disqualifying event as enumerated pursuant to Rule 506(d) of
Regulation D under the Securities Act.

 

Section 3. Representations and Warranties
of the Purchaser.

 

As a material inducement to the Company
to enter into this Agreement and issue and sell the Private Placement Warrants to the Purchaser, the Purchaser hereby represents
and warrants to the Company (which representations and warranties shall survive each Closing Date) that:

 

A. Organization and Requisite
Authority. The Purchaser possesses all requisite power and authority necessary to carry out the transactions contemplated by
this Agreement.

 

B. Authorization; No Breach.

 

(i) This Agreement constitutes
a valid and binding obligation of the Purchaser, enforceable in accordance with its terms, subject to bankruptcy, insolvency, fraudulent
conveyance, reorganization, moratorium and other laws of general applicability relating to or affecting creditors’ rights
and to general equitable principles (whether considered in a proceeding in equity or law).

 

(ii) The execution and delivery
by the Purchaser of this Agreement and the fulfillment of and compliance with the terms hereof by the Purchaser does not and shall
not as of each Closing Date (a) conflict with or result in a breach by the Purchaser of the terms, conditions or provisions
of, (b) constitute a default under, (c) result in the creation of any lien, security interest, charge or encumbrance
upon the Purchaser’s equity or assets under, (d) result in a violation of, or (e) require any authorization, consent,
approval, exemption or other action by or notice or declaration to, or filing with, any court or administrative or governmental
body or agency pursuant to the Purchaser’s organizational documents in effect on the date hereof or as may be amended prior
to completion of the contemplated Public Offering, or any material law, statute, rule or regulation to which the Purchaser
is subject, or any agreement, instrument, order, judgment or decree to which the Purchaser is subject, except for any filings required
after the date hereof under federal or state securities laws.

 

C. Investment Representations.

 

(i) The Purchaser is acquiring
the Private Placement Warrants and, upon exercise of the Private Placement Warrants, the Shares issuable upon such exercise (collectively,
the “Securities”) for its own account, for investment purposes only and not with a view towards, or for resale
in connection with, any public sale or distribution thereof.

 

    3

     

    

 

(ii) The Purchaser is an “accredited
investor” as such term is defined in Rule 501(a)(3) of Regulation D, and the Purchaser has not experienced a disqualifying
event as enumerated pursuant to Rule 506(d) of Regulation D under the Securities Act.

 

(iii) The Purchaser understands
that the Securities are being offered and will be sold to it in reliance on specific exemptions from the registration requirements
of the United States federal and state securities laws and that the Company is relying upon the truth and accuracy of, and the
Purchaser’s compliance with, the representations and warranties of the Purchaser set forth herein in order to determine the
availability of such exemptions and the eligibility of the Purchaser to acquire such Securities.

 

(iv) The Purchaser did not
decide to enter into this Agreement as a result of any general solicitation or general advertising within the meaning of Rule 502(c) under
the Securities Act.

 

(v) The Purchaser has been
furnished with all materials relating to the business, finances and operations of the Company and materials relating to the offer
and sale of the Securities which have been requested by the Purchaser. The Purchaser has been afforded the opportunity to ask questions
of the executive officers and directors of the Company. The Purchaser understands that its investment in the Securities involves
a high degree of risk and it has sought such accounting, legal and tax advice as it has considered necessary to make an informed
investment decision with respect to the acquisition of the Securities.

 

(vi) The Purchaser understands
that no United States federal or state agency or any other government or governmental agency has passed on or made any recommendation
or endorsement of the Securities or the fairness or suitability of the investment in the Securities by the Purchaser nor have such
authorities passed upon or endorsed the merits of the offering of the Securities.

 

(vii) The Purchaser understands
that: (a) the Securities have not been and are not being registered under the Securities Act or any state securities laws,
and may not be offered for sale, sold, assigned or transferred unless (1) subsequently registered thereunder or (2) sold
in reliance on an exemption therefrom; and (b) except as specifically set forth in the Registration and Stockholder Rights
Agreement, neither the Company nor any other person is under any obligation to register the Securities under the Securities Act
or any state securities laws or to comply with the terms and conditions of any exemption thereunder. In this regard, the Purchaser
understands that the SEC has taken the position that promoters or affiliates of a blank check company and their transferees, both
before and after an initial Business Combination, are deemed to be “underwriters” under the Securities Act when reselling
the securities of a blank check company. Based on that position, Rule 144 adopted pursuant to the Securities Act would not
be available for resale transactions of the Securities despite technical compliance with the requirements of such Rule, and the
Securities can be resold only through a registered offering or in reliance upon another exemption from the registration requirements
of the Securities Act.

 

(viii) The Purchaser has such
knowledge and experience in financial and business matters, knowledge of the high degree of risk associated with investments in
the securities of companies in the development stage such as the Company, is capable of evaluating the merits and risks of an investment
in the Securities and is able to bear the economic risk of an investment in the Securities in the amount contemplated hereunder
for an indefinite period of time. The Purchaser has adequate means of providing for its current financial needs and contingencies
and will have no current or anticipated future needs for liquidity which would be jeopardized by the investment in the Securities.
The Purchaser can afford a complete loss of its investments in the Securities.

 

    4

     

    

 

Section 4. Conditions of the Purchaser’s
Obligations.

 

The obligations of the Purchaser to purchase
and pay for the Private Placement Warrants are subject to the fulfillment, on or before each Closing Date, of each of the following
conditions:

 

A. Representations and Warranties.
The representations and warranties of the Company contained in Section 2 shall be true and correct at and as of such Closing
Date as though then made.

 

B. Performance. The Company
shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that are required
to be performed or complied with by it on or before such Closing Date.

 

C. No Injunction. No litigation,
statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated or endorsed
by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority over
the matters contemplated hereby, which prohibits the consummation of any of the transactions contemplated by this Agreement or
the Warrant Agreement.

 

D. Warrant Agreement and Registration
and Stockholder Rights Agreement. The Company shall have entered into the Warrant Agreement and the Registration and Stockholder
Rights Agreement, in each case on terms satisfactory to the Purchaser.

 

Section 5. Conditions of the Company’s
Obligations.

 

The obligations of the Company to the Purchaser
under this Agreement are subject to the fulfillment, on or before each Closing Date, of each of the following conditions:

 

A. Representations and Warranties.
The representations and warranties of the Purchaser contained in Section 3 shall be true and correct at and as of such Closing
Date as though then made.

 

B. Performance. The Purchaser
shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that are required
to be performed or complied with by the Purchaser on or before such Closing Date.

 

C. Corporate Consents.
The Company shall have obtained the consent of its Board of Directors authorizing the execution, delivery and performance of this
Agreement and the Warrant Agreement and the issuance and sale of the Private Placement Warrants hereunder.

 

D. No Injunction. No litigation,
statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated or endorsed
by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority over
the matters contemplated hereby, which prohibits the consummation of any of the transactions contemplated by this Agreement or
the Warrant Agreement.

 

E. Warrant Agreement and Registration
and Stockholder Rights Agreement. The Company shall have entered into the Warrant Agreement and the Registration and Stockholder
Rights Agreement, in each case on terms satisfactory to the Company.

 

Section 6. Termination.

 

This Agreement may be terminated by the
Company or the Purchaser at any time after August 31, 2020 upon written notice to the other party hereto if the closing of
the Public Offering does not occur prior to such date.

 

Section 7. Survival of Representations
and Warranties.

 

All of the representations and warranties
contained herein shall survive each Closing Date.

 

Section 8. Definitions.

 

Terms used but not otherwise defined in
this Agreement shall have the meaning assigned to such terms in the Registration Statement.

 

    5

     

    

 

Section 9. Miscellaneous.

 

A. Successors and Assigns.
Except as otherwise expressly provided herein, all covenants and agreements contained in this Agreement by or on behalf of any
of the parties hereto shall bind and inure to the benefit of the respective successors of the parties hereto whether so expressed
or not. Notwithstanding the foregoing or anything to the contrary herein, the parties may not assign this Agreement, other than
assignments by the Purchaser to affiliates thereof (including, without limitation one or more of its members).

 

B. Severability. Whenever
possible, each provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable law,
but if any provision of this Agreement is held to be prohibited by or invalid under applicable law, such provision shall be ineffective
only to the extent of such prohibition or invalidity, without invalidating the remainder of this Agreement.

 

C. Counterparts. This Agreement
may be executed simultaneously in two or more counterparts, none of which need contain the signatures of more than one party, but
all such counterparts taken together shall constitute one and the same agreement.

 

D. Descriptive Headings; Interpretation.
The descriptive headings of this Agreement are inserted for convenience only and do not constitute a substantive part of this Agreement.
The use of the word “including” in this Agreement shall be by way of example rather than by limitation.

 

E. Governing Law. This
Agreement shall be deemed to be a contract made under the laws of the State of New York and for all purposes shall be construed
in accordance with the internal laws of the State of New York, without giving effect to conflicts of law principles that would
result in the application of the laws of another jurisdiction.

 

F. Amendments. This Agreement
may not be amended, modified or waived as to any particular provision, except by a written instrument executed by all parties hereto.

 

[Signature page follows]

 

    6

     

    

 

IN WITNESS WHEREOF, the parties hereto have
executed this Agreement to be effective as of the date first set forth above.

 

	 	COMPANY:
	 	 	 
	 	OCA Acquisition Corp.
	 	 
	 	By:	 
	 	Name:	David Shen
	 	Title:	Chief Executive Officer
	 	 	 
	 	PURCHASER:
	 	 
	 	OCA Acquisition Holdings LLC
	 	 
	 	By:	 
	 	Name: 	David Shen
	 	Title:	 

 

[Signature Page to Warrant Purchase
Agreement]

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