The Case of Ritsu Onodera No.13

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==Release Information==
To be added.
== Short Summary ==
In "The Case of Ritsu Onodera No.13," it's Ritsu Onodera's birthday. Just as Masamune Takano tries to make plans for Ritsu's big day, Ryuichiro Isaka announces his flower-viewing party on the same day, and it falls on Ritsu to reserve a venue for it. At the party, Ritsu drinks too much as some young female co-workers chat him up. Takano takes Ritsu home, and Ritsu wakes up in Takano's bed. Five minutes before midnight, Takano wishes him happy birthday and they have sex. The next day at work, the women from the party try to get Ritsu to go out for drinks with them, but Takano gets jealous and invites them to join him instead.
== Long Summary ==
To be added.
==Adaptations==
=== Mobile Game ===
==== Ritsu Onodera Birthday ====
Ritsu Onodera Birthday (小野寺律誕生日, Onodera Ritsu tanjōbi) Gacha was a limited gacha that was released March 15th, 2019 at 10:00AM JST that was available through March 29th, 2019 at 10:00AM JST released through the Sekai-ichi Hatsukoi mobile game.
Some of the items in the set are based off of The Case of Ritsu Onodera No.13 and No.14. The items specifically based off of No.13 include the cherry blossom background as well as the speech bubbles.
RitsuOnoderaBirthdayGacha-1.jpg|Cherry Blossom Trees at Night (夜桜並木, Yoru Sakuranamiki) - 4.16%
RitsuOnoderaBirthdayGacha-2.jpg|Masamune Takano's Gentle Face (高野政宗の優しい顔, Takano Masamune no yasashī kao) - 4.16%
RitsuOnoderaBirthdayGacha-3.jpg|Ritsu Onodera's Surprised Face (小野寺律の驚いた顔, Onodera Ritsu no odoroita-gao) - 4.16%
RitsuOnoderaBirthdayGacha-4.jpg|Gifted Clothes (プレゼントにもらった服装, Purezento ni moratta fukusō) - 4.16%
RitsuOnoderaBirthdayGacha-5.jpg|"Happy Birthday" (「おたんじょうびおめでとう」, `O tanjō biomedetō') - 16.66%
RitsuOnoderaBirthdayGacha-6.jpg|"T-thank you very much..." (「あ、ありがとうございます…」, `A , arigatōgozaimasu…') - 16.66%
RitsuOnoderaBirthdayGacha-7.jpg|Cake (手持ちケーキ, Temochi kēki) - 16.66%
RitsuOnoderaBirthdayGacha-8.jpg|Gift Box (プレゼントの箱, Purezento no hako) - 16.66%
RitsuOnoderaBirthdayGacha-9.jpg|Cherry Blossom Petals (桜のはなびら, Sakura no Hana bira ) - 16.66%
==== Cherry Blossom Dance 3/27 ====
The Cherry Blossom Dance 3/27 (桜舞う3月27日, Sakuramau 3 tsuki 27-nichi) Gacha was a limited gacha that was released March 15th, 2021 at 10:00AM JST that was available through April 1st, 2021 at 10:00AM JST released through the Sekai-ichi Hatsukoi mobile game.
Some of the items in the set are based off of The Case of Ritsu Onodera No.13. This includes Ritsu's cardigan and drunken face, Takano's knitted scarf, the gift bag Takano gives to Ritsu, the speech bubbles, as well as the cherry blossom tree background.
CherryBlossom327Gacha-1.jpg|Dancing with Cherry Blossoms at Night (桜の舞う夜の桜街道, Sakura no mau yoru no sakura kaidō) - 3.7%
CherryBlossom327Gacha-2.jpg|Ritsu Onodera's Drunken Face (小野寺律の酔った顔, Onodera Ritsu no yotta-gao) - 3.7%
CherryBlossom327Gacha-3.jpg|Thick Long Cardigan (厚手のロングカーデ, Atsude no rongukāde) - 3.7%
CherryBlossom327Gacha-4.jpg|"It's Cherry Blossom Day." (さくらの日だって, Sakura no hi datte) - 14.81%
CherryBlossom327Gacha-5.jpg|"The cherry blossoms are pretty." (さくらきれいれすね, Sakura kireire sune) - 14.81%
CherryBlossom327Gacha-6.jpg|Gifts (用意していたプレゼント, Yōi shite ita purezento) - 14.81%
CherryBlossom327Gacha-7.jpg|Knitted Scarf (ニットの筒マフラー, Nitto no tsutsu mafurā) - 14.81%
CherryBlossom327Gacha-8.jpg|Cherry Blossom Petals on the Head (頭にのった桜の花びら, Atama ni notta sakuranohanabira) - 14.81%
CherryBlossom327Gacha-9.jpg|Ritsu Onodera's Birthday Balloons (小野寺律の誕生日風船, Onodera Ritsu no tanjōbi fūsen) - 14.81%
== Gallery ==
To be added.
==Navigation==
== References ==
Category:The Case of Ritsu Onodera
Category:Volume 7