(C89) [Coopy (Yomogi)] Chino-chan to Naisho no Obenkyou (Gochuumon wa Usagi desu ka?)
Obenkyou ≒ Sex
Unicorn-chan to Himitsu no Obenkyoukai
Hametsu Otome Shuu
[Fuyuno Mikan] Obenkyou wa Ecchi no Ato de (COMIC LO 2016-03) [Chinese] [想抱雷妈汉化组] [Digital]
(Reitaisai 15) [Arutana (Chipa)] Kokoro Onee-chan to H na Obenkyou (Touhou Project)
Asoberu Karada - Feel Gorgeous Body For Man | 適合玩弄的肉體
[Mutou Koucha] Chiteki Bungaku Bishoujo to Ikimakuri Obenkyou Ecchi [Chinese] [XM漢化] [Digital]
(Reitaisai 15) [Arutana (Chipa)] Kokoro Onee-chan to H na Obenkyou | Study-Time with Kokoro Onee-chan (Touhou Project) [English] [Mister lol]
Sanae Onee-chan de Obenkyou Shiyou!
[Ishikei] Iroiro 09 - Various Things That Don't Matter [English] [YQII] [Decensored]
(C75) [HarthNir (Misakura Nankotsu)] G.A.l.g.(f) (Various) [Digital]
[Aikuri] Obenkyou no Jikan