Document:

Exhibit 10.4

 

UNIT SUBSCRIPTION AGREEMENT

 

This UNIT SUBSCRIPTION AGREEMENT
(this “Agreement”) is made as of this 30th day of March, 2021, by and between Nocturne Acquisition
Corporation, a Cayman Islands exempted company (the “Company”), having its principal place of business 7244
Carrizo Drive, La Jolla, CA 92037, and Nocturne Sponsor LLC (the “Purchaser”).

 

WHEREAS, the Company desires
to sell on a private placement basis (the “Offering”) an aggregate of 450,000 units (the “Initial
Units”) of the Company, each Initial Unit comprised of one ordinary share of the Company, par value $0.0001 per share (the
“Ordinary Shares”) and one right (the “Right”) to be governed by the Rights Agreement
(defined herein), for a purchase price of $4,500,000, or $10.00 per Initial Unit, and up to 45,000 units (“Additional Units”
and together with the Initial Units, the “Units”), each Additional Unit comprised of one Ordinary Share and
one Right, for a purchase price of $450,000, or $10.00 per Additional Unit. Each Right entitles the holder thereof to receive one-tenth
(1/10) of one Ordinary Share (the “Right Shares”) upon the consummation of an initial business combination.

 

WHEREAS, the Purchaser desires
to purchase the Initial Units and the Company wishes to accept such subscription.

 

NOW, THEREFORE, in consideration
of the promises and the mutual covenants hereinafter set forth and other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, the Company and the Purchaser hereby agree as follows:

 

1. Agreement to Subscribe

 

1.1. Purchase and
Issuance of the Initial Units. For the aggregate sum of $4,500,000 (the “Initial Purchase Price”), upon
the terms and subject to the conditions of this Agreement, the Purchaser hereby agrees to purchase from the Company, and the Company hereby
agrees to sell to the Purchaser, on the Closing Date (as defined in Section 1.2) 450,000 Initial Units at $10.00 per Initial Unit.

 

In addition to the foregoing,
the Purchaser hereby agrees to purchase up to an additional 45,000 Additional Units at $10.00 per Additional Unit for a purchase price
of $450,000 (the “Additional Purchase Price” and together with the Initial Purchase Price, the “Purchase
Price”). The purchase and issuance of the Additional Units shall occur only in the event that the underwriters’ 45-day
over-allotment option (“Over-Allotment Option”) in the Offering is exercised in full or part. The total number
of Additional Units to be purchased hereunder shall be in the same proportion as the amount of the Over-Allotment Option that is exercised.
Each purchase of Additional Units shall occur simultaneously with the consummation of any portion of the Over-Allotment Option.

 

1.2. Closing.
The closing (the “Closing”) of the Offering shall take place at the offices of Ellenoff Grossman & Schole
LLP, 1345 Avenue of the Americas, New York, New York, 10105 simultaneously with the consummation of the Company’s initial public
offering (“IPO”) of 10,000,000 Units and the consummation of the exercise of all or any portion of the Over-Allotment
Option (each a “Closing Date”).

 

1.3. Delivery of
the Purchase Price. At least one business day prior to the effective date of the Company’s registration statement relating to
the IPO (“Registration Statement”), or the date of the exercise of the Over-Allotment Option, if any, the Purchaser
agrees to deliver the Initial Purchase Price or Additional Purchase Price, as the case may be, by certified bank check or wire transfer
of immediately available funds denominated in United States Dollars to Continental Stock Transfer & Trust Company, a New York corporation
(“CST”), which is hereby irrevocably authorized to deposit such funds on the applicable Closing Date to the trust account
which will be established for the benefit of the Company’s public shareholders, managed pursuant to that certain Investment Management
Trust Agreement to be entered into by and between the Company and CST and into which substantially all of the proceeds of the IPO will
be deposited (the “Trust Account”). If the IPO is not consummated within 14 days of the date the Initial Purchase
Price is delivered to CST, the Initial Purchase Price shall be returned to the Purchaser by certified bank check or wire transfer of immediately
available funds denominated in United States Dollars, without interest or deduction.

 

     

     

    

 

1.4. Delivery of
Unit Certificate. Upon the applicable Closing Date after delivery of the Purchase Price in accordance with Section 1.3, the Purchaser
shall become irrevocably entitled to receive a unit certificate representing the Units purchased hereunder.

 

2. Representations
and Warranties of the Purchaser

 

The Purchaser represents
and warrants to the Company that:

 

2.1. No Government
Recommendation or Approval. It understands that no United States federal or state agency or similar agency of any other country has
passed upon or made any recommendation or endorsement of the Company, the Offering, the Units, the Rights, the Right Shares or the Ordinary
Shares underlying the Units (excluding the Right Shares, the “Unit Shares” and, collectively with the Units
and the Right Shares, the “Securities”).

 

2.2. Organization. 
It is a company, validly existing and in good standing under the laws of its jurisdiction and possesses all requisite power and authority
necessary to carry out the transactions contemplated by this Agreement.

 

2.3. Private Offering.
It is an “accredited investor” as such term is defined in Rule 501(a) of Regulation D under the Securities Act of 1933, as
amended (the “Securities Act”) or it is not a “U.S. Person” as defined in Rule 902 of Regulation S (“Regulation
S”) under the Securities Act. It acknowledges that the sale contemplated hereby is being made in reliance on a private placement
exemption to “Accredited Investors” within the meaning of Section 501(a) of Regulation D under the Securities Act and similar
exemptions under state law or a non-U.S. Person under Regulation S.

 

2.4. Authority.
This Agreement has been validly authorized, executed and delivered by the Purchaser and is a valid and binding agreement enforceable in
accordance with its terms, except as such enforceability may be limited by applicable bankruptcy, insolvency, fraudulent conveyance or
similar laws affecting the enforcement of creditors’ rights generally and subject to general principles of equity (regardless of
whether enforcement is sought in a proceeding at law or in equity).

 

2.5. No Conflicts.
The execution, delivery and performance of this Agreement and the consummation by the Purchaser of the transactions contemplated hereby
do not violate, conflict with or constitute a default under (i)  the Purchaser’s organizational documents, (ii) any agreement,
indenture or instrument to which the Purchaser is a party or (iii) any law, statute, rule or regulation to which the Purchaser is subject,
or any agreement, order, judgment or decree to which the Purchaser is subject.

 

2.6. No Legal Advice
from Company. It acknowledges it has had the opportunity to review this Agreement and the transactions contemplated by this Agreement
and the other agreements entered into between the parties hereto with its own legal counsel and investment and tax advisors. Except for
any statements or representations of the Company made in this Agreement and the other agreements entered into between the parties hereto,
it is relying solely on such counsel and advisors and not on any statements or representations of the Company or any of its representatives
or agents for legal, tax or investment advice with respect to this investment, the transactions contemplated by this Agreement or the
securities laws of any jurisdiction.

 

2.7. Access to Information;
Independent Investigation. Prior to the execution of this Agreement, it has had the opportunity to ask questions of and receive answers
from representatives of the Company concerning an investment in the Company, as well as the finances, operations, business and prospects
of the Company, and the opportunity to obtain additional information to verify the accuracy of all information so obtained. In determining
whether to make this investment, it has relied solely on its own knowledge and understanding of the Company and its business based upon
its own due diligence investigation and the information furnished pursuant to this paragraph. It understands that no person has been authorized
to give any information or to make any representations which were not furnished pursuant to this Section 2 and it has not relied on any
other representations or information in making its investment decision, whether written or oral, relating to the Company, its operations
and/or its prospects.

 

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2.8. Reliance on
Representations and Warranties. It understands the Units are being offered and sold to it in reliance on exemptions from the registration
requirements under the Securities Act, and analogous provisions in the laws and regulations of various states, and that the Company is
relying upon the truth and accuracy of the representations, warranties, agreements, acknowledgments and understandings of the Purchaser
set forth in this Agreement in order to determine the applicability of such provisions.

 

2.9.  No Advertisements.
It is not subscribing for the Units as a result of or subsequent to any advertisement, article, notice or other communication published
in any newspaper, magazine, or similar media or broadcast over television or radio, or presented at any seminar or meeting.

 

2.10. Legend.
It acknowledges and agrees the certificates evidencing the Units, the Ordinary Shares and the Rights shall bear a restrictive legend (the
“Legend”), in form and substance as set forth in Section 4 hereof, prohibiting the offer, sale, pledge
or transfer of the securities, except (i) pursuant to an effective registration statement covering these securities under the Securities
Act or (ii) pursuant to any other exemptions from the registration requirements under the Securities Act and such laws which, in
the opinion of counsel for the Company, is available.

 

2.11. Experience,
Financial Capability and Suitability. It is (i) sophisticated in financial matters and is able to evaluate the risks and benefits
of the investment in the Securities and (ii) able to bear the economic risk of his investment in the Securities for an indefinite period
of time because the Securities have not been registered under the Securities Act and therefore cannot be sold unless subsequently registered
under the Securities Act or an exemption from such registration is available. It has substantial experience in evaluating and investing
in transactions of securities in companies similar to the Company so that it is capable of evaluating the merits and risks of its investment
in the Company and has the capacity to protect its own interests. It has substantial experience in evaluating and investing in transactions
of securities in companies similar to the Company so that it is capable of evaluating the merits and risks of its investment in the Company
and has the capacity to protect its own interests.

 

2.12. Investment
Purposes. It is purchasing the Securities solely for investment purposes, for its own account and not for the account or benefit of
any other person, and not with a view towards the distribution or dissemination thereof and it has no present arrangement to sell the
interest in the Securities to or through any person or entity.

 

2.13. Restrictions
on Transfer. It acknowledges and understands the Units are being offered in a transaction not involving a public offering in the United
States within the meaning of the Securities Act. The Securities have not been registered under the Securities Act, and, if in the future,
it decides to offer, resell, pledge or otherwise transfer the Securities, such Securities may be offered, resold, pledged or otherwise
transferred only (A) pursuant to an effective registration statement filed under the Securities Act, (B) pursuant to an exemption
from registration under Rule 144 promulgated under the Securities Act (“Rule 144”), if available, or (C) pursuant
to any other available exemption from the registration requirements of the Securities Act, and in each case in accordance with any applicable
securities laws of any state or any other jurisdiction. It agrees that if any transfer of its Securities or any interest therein is proposed
to be made, as a condition precedent to any such transfer, it may be required to deliver to the Company an opinion of counsel satisfactory
to the Company. Absent registration or another available exemption from registration, it agrees it will not resell the Securities. It
further acknowledges that because the Company is a shell company, Rule 144 may not be available to it for the resale of the Securities
until the one year anniversary following consummation of the initial Business Combination (defined below) of the Company, despite technical
compliance with the requirements of Rule 144 and the release or waiver of any contractual transfer restrictions.

 

3. Representations
and Warranties of the Company

 

The Company represents and
warrants to the Purchaser that:

 

3.1. Valid Issuance
of Share Capital. The total number of all classes of share capital which the Company has authority to issue is (i) 500,000,000 Ordinary
Shares and (ii) 5,000,000 undesignated preference shares. As of the date hereof, the Company has issued 2,875,000 Ordinary Shares (of
which 375,000 Ordinary Shares are subject to forfeiture as described in the registration statement related to the IPO) and no preferred
shares are issued and outstanding. All of the issued share capital of the Company has been duly authorized, validly issued, and are fully
paid and non-assessable.

 

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3.2. Title to Securities.
Upon issuance in accordance with, and payment pursuant to, the terms hereof and the rights agreement to be entered into with CST on or
prior to the closing of the IPO (the “Rights Agreement”) and the Amended and Restated Memorandum and Articles
of Association of the Company (as applicable), as the case may be, each of the Rights and the Ordinary Shares will be duly and validly
issued, fully paid and non-assessable. On the date of issuance of the Units and the Right Shares shall have been reserved for issuance.
Upon issuance in accordance with the terms hereof the Rights Agreement, the Purchaser will have or receive good title to the Right Shares,
free and clear of all liens, claims and encumbrances of any kind other than (i) transfer restrictions hereunder and pursuant to the insider
letter to be entered into on or prior to the closing of the IPO (the “Insider Letter”) and (ii) transfer restrictions
under federal and state securities laws.

 

3.3. Organization
and Qualification. The Company has been duly incorporated and is validly existing as a Cayman Islands exempted company and has the
requisite corporate power to own its properties and assets and to carry on its business as now being conducted.

 

3.4. Authorization;
Enforcement. (i) The Company has the requisite corporate power and authority to enter into and perform its obligations under
this Agreement and to issue the Securities in accordance with the terms hereof, (ii) the execution, delivery and performance of this
Agreement by the Company and the consummation by it of the transactions contemplated hereby have been duly authorized by all necessary
corporate action and no further consent or authorization of the Company or its Board of Directors or shareholders is required, and (iii) this
Agreement constitutes, and upon the execution and delivery thereof, the Rights and Rights Agreement will constitute, valid and binding
obligations of the Company enforceable against the Company in accordance with their respective terms, except as such enforceability may
be limited by applicable bankruptcy, insolvency, fraudulent conveyance, moratorium, reorganization, or similar laws relating to, or affecting
generally the enforcement of, creditors’ rights and remedies or by equitable principles of general application and except as enforcement
of rights to indemnity and contribution may be limited by federal and state securities laws or principles of public policy.

 

3.5. No Conflicts.
The execution, delivery and performance of this Agreement and the consummation by the Company of the transactions contemplated hereby
do not (i) result in a violation of the Company’s Memorandum and Articles of Association, (ii) conflict with, or constitute
a default under any agreement, indenture or instrument to which the Company is a party or (iii) conflict with any law statute, rule or
regulation to which the Company is subject or any agreement, order, judgment or decree to which the Company is subject. Other than any
federal, state or foreign securities filings which may be required to be made by the Company subsequent to the Closing, and any registration
statement which may be filed pursuant thereto, the Company is not required under federal, state or local law, rule or regulation to obtain
any consent, authorization or order of, or make any filing or registration with, any court or governmental agency or self-regulatory entity
in order for it to perform any of its obligations under this Agreement or issue the Units, the Rights or the Ordinary Shares underlying
the Units or Rights in accordance with the terms hereof.

 

4. Legends

 

4.1. Legend.
The Company will issue the Units, the Rights and the Unit Shares, and when issued, the Right Shares purchased by the Purchaser, in the
name of the Purchaser. The Securities will bear the following Legend and appropriate “stop transfer” instructions:

 

THESE SECURITIES (i) HAVE NOT BEEN REGISTERED
UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND THESE SECURITIES MAY NOT BE OFFERED,
SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT (A) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT FILED UNDER THE SECURITIES ACT, (B)
TO A NON-U.S. PERSON IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH RULE 903 OR RULE 904 OF REGULATION S UNDER THE SECURITIES ACT, (C)
PURSUANT TO THE RESALE LIMITATIONS SET FORTH IN RULE 905 OF REGULATION S UNDER THE SECURITIES ACT, (D) PURSUANT TO AN EXEMPTION FROM REGISTRATION
PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE) OR (E) PURSUANT TO ANY OTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS
OF THE SECURITIES ACT, IN EACH CASE IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES OR ANY OTHER JURISDICTION.
HEDGING TRANSACTIONS INVOLVING THESE SECURITIES MAY NOT BE CONDUCTED UNLESS IN COMPLIANCE WITH THE SECURITIES ACT. 

 

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“THE SECURITIES REPRESENTED BY THIS CERTIFICATE
ARE SUBJECT TO AN AGREEMENT BETWEEN NOCTURNE ACQUISITION CORPORATION AND NOCTURNE SPONSOR, LLC AND MAY ONLY BE OFFERED, SOLD, TRANSFERRED,
PLEDGED OR OTHERWISE DISPOSED DURING THE TERM OF THE LOCKUP PURSUANT TO THE TERMS SET FORTH THEREIN.”

 

4.2. Purchaser’s
Compliance. Nothing in this Section 4 shall affect in any way the Purchaser’s obligations and agreements to comply with
all applicable securities laws upon resale of the Securities.

 

4.3. Company’s
Refusal to Register Transfer of the Securities. The Company shall refuse to register any transfer of the Securities, if in the sole
judgment of the Company such purported transfer would not be made (i) pursuant to an effective registration statement filed under
the Securities Act, or (ii) pursuant to an available exemption from the registration requirements of the Securities Act.

 

4.4. Registration
Rights. The Purchaser will be entitled to certain registration rights which will be governed by a registration rights agreement (“Registration
Rights Agreement”) to be entered into with the Company on or prior to the closing of the IPO.

 

5. Lockup

 

The Purchaser acknowledges
and agrees that the Units, the Rights, the Unit Shares, and the Right Shares shall not be transferable, saleable or assignable until thirty
(30) days after the consummation of an acquisition, share exchange, purchase of all or substantially all of the assets of, or any other
similar business combination with one or more businesses or entities (a “Business Combination”), except to permitted
transferees (as defined in the Insider Letter).

 

6. Securities Laws
Restrictions

 

The Purchaser agrees not
to sell, transfer, pledge, hypothecate or otherwise dispose of all or any part of the Securities unless, prior thereto (a) a registration
statement on the appropriate form under the Securities Act and applicable state securities laws with respect to the Securities proposed
to be transferred shall then be effective or (b) the Company shall have received an opinion from counsel reasonably satisfactory
to the Company, that such registration is not required because such transaction complies with the Securities Act and the rules promulgated
by the Securities and Exchange Commission thereunder and with all applicable state securities laws.

 

7. Waiver of Distributions
from Trust Account

 

In connection with the Securities
purchased pursuant to this Agreement, the Purchaser hereby waives any and all right, title, interest or claim of any kind in or to any
distributions from the Trust Account.

 

8. Rescission Right
Waiver and Indemnification

 

8.1. Rescission Waiver.
The Purchaser understands and acknowledges that an exemption from the registration requirements of the Securities Act requires there be
no general solicitation of purchasers of the Units. In this regard, if the Offering were deemed to be a general solicitation with respect
to the Units, the offer and sale of such Units may not be exempt from registration and, if not, the Purchaser may have a right to rescind
its purchase of the Units. In order to facilitate the completion of the Offering and in order to protect the Company, its shareholders
and the Trust Account from claims that may adversely affect the Company or the interests of its shareholders, the Purchaser hereby agrees
to waive, to the maximum extent permitted by applicable law, any claims, right to sue or rights in law or arbitration, as the case may
be, to seek rescission of its purchase of the Units as a result of the issuance of the Units being deemed to be in violation of Section
5 of the Securities Act. The Purchaser acknowledges and agrees this waiver is being made in order to induce the Company to sell the Units
to the Purchaser. The Purchaser agrees the foregoing waiver of rescission rights shall apply to any and all known or unknown actions,
causes of action, suits, claims or proceedings (collectively, “Claims”) and related losses, costs, penalties,
fees, liabilities and damages, whether compensatory, consequential or exemplary, and expenses in connection therewith, including reasonable
attorneys’ and expert witness fees and disbursements and all other expenses reasonably incurred in investigating, preparing or defending
against any Claims, whether pending or threatened, in connection with any present or future actual or asserted right to rescind the purchase
of the Units hereunder or relating to the purchase of the Units and the transactions contemplated hereby. 

 

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8.2. No Recourse
Against Trust Account. The Purchaser agrees not to seek recourse against the Trust Account for any reason whatsoever in connection
with its purchase of the Units or any Claim that may arise now or in the future.

  

8.3. Section 8 Waiver.
The Purchaser agrees that to the extent any waiver of rights under this Section 8 is ineffective as a matter of law, the Purchaser has
offered such waiver for the benefit of the Company as an equitable right that shall survive any statutory disqualification or bar that
applies to a legal right. The Purchaser acknowledges the receipt and sufficiency of consideration received from the Company hereunder
in this regard.

 

9. Terms of the Unit

 

The Units shall be substantially
identical to the Units offered in the IPO as set forth in the Underwriting Agreement, except the Units: (i) will be subject to the transfer
restrictions described herein, and (ii) are being purchased pursuant to an exemption from the registration requirements of the Securities
Act and will become freely tradable only after certain conditions are met or the resale of the Units is registered under the Securities
Act.

 

10. Governing Law;
Jurisdiction; Waiver of Jury Trial

 

This Agreement shall be governed
by and construed in accordance with the laws of the State of New York for agreements made and to be wholly performed within such territory.
The parties hereto hereby waive any right to a jury trial in connection with any litigation pursuant to this Agreement and the transactions
contemplated hereby.

 

11. Assignment; Entire
Agreement; Amendment

 

11.1. Assignment.
Neither this Agreement nor any rights hereunder may be assigned by any party to any other person other than by the Purchaser, without
the prior consent of the Company, to one or more persons agreeing to be bound by the terms hereof. Upon such assignment by a Purchaser,
the assignee(s) shall become Purchaser hereunder and have the rights and obligations provided for herein to the extent of such assignment.

 

11.2. Entire Agreement. This
Agreement sets forth the entire agreement and understanding between the parties as to the subject matter hereof and supersedes any and
all prior discussions, agreements and understandings of any and every nature.

 

11.3. Amendment.
Except as expressly provided in this Agreement, neither this Agreement nor any term hereof may be amended, waived, discharged or terminated
other than by a written instrument signed by the party against whom enforcement of any such amendment, waiver, discharge or termination
is sought.

 

11.4. Binding upon
Successors. This Agreement shall be binding upon and inure to the benefit of the parties hereto and to their respective heirs, legal
representatives, successors and permitted assigns.

 

12. Notices; Indemnity

 

12.1 Notices.
All notices, requests, consents and other communications hereunder shall be in writing, shall be addressed to the receiving party’s
address set forth herein or to such other address as a party may designate by notice hereunder, and shall be either (a) delivered by hand,
(b) sent by overnight courier, or (c) sent by certified mail, return receipt requested, postage prepaid. All notices, requests, consents
and other communications hereunder shall be deemed to have been given either (i) if by hand, at the time of the delivery thereof to the
receiving party at the address of such party set forth above, (ii) if sent by overnight courier, on the next business day following the
day such notice is delivered to the courier service, or (iii) if sent by certified mail, on the fifth business day following the day such
mailing is made. 

 

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12.2 Indemnification.
Except as set forth in Section 8, each party shall indemnify the other party against any loss, cost or damages (including reasonable attorney’s
fees and expenses) incurred as a result of such party’s breach of any representation, warranty, covenant or agreement set forth
in this Agreement.

 

13. Counterparts

 

This Agreement may be executed
in one or more counterparts, all of which when taken together shall be considered one and the same agreement and shall become effective
when counterparts have been signed by each party and delivered to the other party, it being understood that both parties need not sign
the same counterpart.  In the event that any signature is delivered by facsimile transmission or any other form of electronic delivery,
such signature shall create a valid and binding obligation of the party executing (or on whose behalf such signature is executed) with
the same force and effect as if such signature page were an original thereof.

 

14. Survival; Severability

 

14.1. Survival.
The representations, warranties, covenants and agreements of the parties hereto shall survive the Closing until one (1) year following
the consummation of an initial Business Combination.

 

14.2. Severability.
In the event that any provision of this Agreement becomes or is declared by a court of competent jurisdiction to be illegal, unenforceable
or void, this Agreement shall continue in full force and effect without said provision; provided that no such severability
shall be effective if it materially changes the economic benefit of this Agreement to any party.

 

15. Headings

 

The titles and subtitles
used in this Agreement are used for convenience only and are not to be considered in construing or interpreting this Agreement.

 

16. Construction

 

The parties hereto have participated
jointly in the negotiation and drafting of this Agreement. If an ambiguity or question of intent or interpretation arises, this Agreement
will be construed as if drafted jointly by the parties hereto and no presumption or burden of proof will arise favoring or disfavoring
any party hereto because of the authorship of any provision of this Agreement. The words “include,” “includes,”
and “including” will be deemed to be followed by “without limitation.” Pronouns in masculine, feminine,
and neuter genders will be construed to include any other gender, and words in the singular form will be construed to include the plural
and vice versa, unless the context otherwise requires. The words “this Agreement,” “herein,” “hereof,”
“hereby,” “hereunder,” and words of similar import refer to this Agreement as a whole and not to
any particular subdivision unless expressly so limited. The parties hereto intend that each representation, warranty, and covenant contained
herein will have independent significance. If any party hereto has breached any representation, warranty, or covenant contained herein
in any respect, the fact that there exists another representation, warranty or covenant relating to the same subject matter (regardless
of the relative levels of specificity) which such party hereto has not breached will not detract from or mitigate the fact that such party
hereto is in breach of the first representation, warranty, or covenant.

 

[remainder of page intentionally left blank]

 

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This subscription is accepted by the Company as
of the date first written above.

 

	 	NOCTURNE ACQUISITION CORPORATION
	 	 	 
	 	By:	/s/ Henry
Monzon
	 	Name:	Henry Monzon
	 	Title:	Chief Executive Officer

 

Accepted and agreed this

30th day of March, 2021

 

NOCTURNE SPONSOR, LLC

 

	By:	/s/
Henry Monzon	 
	Name: 	Henry Monzon	 
	Title:	Managing MemberExhibit 10.5

 

Nocturne Acquisition Corporation

 

7244 Carizzo Drive

La Jolla, CA 92037

 

March 30, 2021

 

Ladies and Gentlemen:

 

This letter will confirm our agreement that, commencing on the effective
date (the “Effective Date”) of the registration statement (the “Registration Statement”)
for the initial public offering (the “IPO”) of the securities of Nocturne Acquisition Corporation (the “Company”)
and continuing until the earlier of (i) the consummation by the Company of an initial business combination and (ii) the Company’s
liquidation (in each case as described in the Registration Statement) (such earlier date hereinafter referred to as the “Termination
Date”), Nocturne Sponsor LLC shall make available to the Company certain office space and administrative and support services
as may be required by the Company from time to time, at 7244 Carizzo Drive, La Jolla, CA 92037. In exchange therefore, the Company shall
pay Nocturne Sponsor LLC $10,000 per month on the Effective Date and continuing monthly thereafter until the Termination Date.

 

Nocturne Sponsor LLC hereby agrees that it does not have any right,
title, interest or claim of any kind in or to any monies that may be set aside in a trust account (the “Trust Account”)
that may be established upon the consummation of the IPO and will not seek recourse against the Trust Account for any reason whatsoever.

 

This agreement may not be amended, modified or waived as to any particular
provision, except by a written instrument executed by the parties hereto.

 

No party hereto may assign this agreement or any rights, interests
or contracted obligations hereunder without the prior written approval of the other party. Any purported assignment in violation of this
paragraph shall be void and ineffectual and shall not operate to transfer or assign any interest or title to the purported assignee.

 

This agreement shall be governed by, construed in accordance with,
and interpreted pursuant to the laws of the State of New York, without giving effect to its choice of law principles.

 

     

     

    

 

	 	Very truly yours,
	 	 
	 	Nocturne Acquisition Corporation
	 	 
	 	By:	/s/ Henry Monzon
	 	 	Name: Henry Monzon
	 	 	
    Title:   Chairman and Chief Executive Officer

  

AGREED TO AND ACCEPTED BY:

 

	Nocturne Sponsor LLC	 
	 	 	 
	By:	 /s/ Henry Monzon	 
	 	Name: Henry Monzon	 
	 	Title:  Managing Member	 

 

 

[Signature page to Administrative Services Agreement]

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