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[Naitou Gura] Ochiteiku Karada Zenpen (Be)
https://hitomi.la/manga/ochiteiku-karada-%7C-down-the-drain-english-1598773.html#1
[Trista] Onegai! Tsukumogami-sama! (Be)
https://hitomi.la/manga/onegai!-tsukumogami-sama!-english-2063759.html#1
[Calpi] Onna Yuusha, Jintai Shasei ni Chiru (Be)
https://hitomi.la/manga/onna-yuusha,-jintai-shasei-ni-chiru-english-2053070.html#1
[shuz] Ookiku Naritai! (Be)
https://hitomi.la/manga/ookiku-naritai!-espa%C3%B1ol-1532438.html#1 (Español)
[Mira] Oppai-chiyan to Chippai-changa Irekawaru Hanashi (Bodyswap)
[Shimanto Youta] Oppai-mania (Be)
https://hitomi.la/manga/opai-mania-%E6%97%A5%E6%9C%AC%E8%AA%9E-30857.html
[Chirumakuro] Oppai H dake no Kankei (Be)
[Kouzuki Rio] Osanahime Yogatari Nemurenai Ibarahime no H na Himegoto (BeBr)
[Koayako] Oshini Yowai Onna (Be)
https://hitomi.la/manga/oshini-yowai-onna-|-juggy-girls-who-give-in-with-a-little-push-english-1694451.html