| Onee-san? wa Akumakko! Makai no Hime wa Shiri-zuri Jouzu de Binkan Manyuu. Sonna ni Kosuccha... Ryameee!! | 2008-02-19 | 5.30 (7) |
| Onee-san ☆ Hara Mix | 2009-03-27 | 6.80 (34) |
| Onee-san x Shuffle! ~Tomodachi no Onee-chan no Ecchi na Karada.~ | 2017-12-22 | 7.50 (123) |
| Onee-san x Scratch | 2008-07-25 | 7.00 (13) |
| Onee-san wa Majo | 2008-04-08 | - (1) |
| Onee-san no Ecchi na Tehodoki | 2010-07-16 | - (1) |
| Onee-san Technique ~Seikyouiku to Hatsutaiken~ | 2017-09-29 | 6.50 (13) |
| Onee-san Sensei ~Hoshuu Jugyou no Ecchi na Sensei~ | 2019-03-29 | 7.30 (118) |
| Onee-san Nakadashi Chikan Ressha | 2004-12-10 | 7.00 (14) |
| Onee-sama wa Hoken'i "Otouto ga Sukisugite, Nakisakebu Hodo Ijimetaku Nacchau no♥" | 2012-02-24 | 6.40 (17) |
| Onee-sama no ♂ (Are) ~Moegi Shinku no Junan!?~ | 2008-08-29 | 6.70 (11) |
| Onee-chan wa Kushizashikou!? ~Atashi no Kui de Tsuranuite Ageru~ | 2018-03-23 | 6.60 (30) |
| Onee-chan to Shota-kun to. ~Naka o Yoku Suru H no Kankei~ | 2016-08-26 | 6.40 (49) |
| Onee-chan to Issho. ~Yuina no Ama Ama Zen Koutei~ | 2020-10-25 | 5.90 (32) |
| Onee-chan no Yuuwaku | 2018-04-27 | 7.30 (941) |
| Onee-chan no Seikyouiku ~Cool ni do M Choukyou Shite Ageru~ | 2016-07-23 | - |
| Onee-chan no Kareshi Moracchau ne♪ ~Futago no Imouto no Yuganda Aizou~ | 2020-01-17 | 6.10 (42) |
| Onee-chan no Ama Ero Lesson ~Sewayaki Kyonyuu Onee-chan-sensei ni Tappuri Amaeru Mecha Ero School Life~ | 2024-09-27 | 6.90 (38) |
| Onee-chan no Ama Ero Lesson 2 ~Otonari no Kyonyuu Onee-chan ni Ippai Amayakasareru Mecha Ero Life~ | 2025-06-27 | 7.40 (31) |
| Onee-chan ni Ippai Amaetai Shasei Saseraretai!! | 2016-06-24 | 5.10 (6) |
| Onee-chan Video SE | 2000-09-08 | - (3) |
| Onee-chan Video | 1997-09-06 | - (2) |
| Onee-chan Ponpon | 2009-06-09 | 5.90 (7) |
| Onee-chan Maid no Gohoushi Time ~Himitsu Nan Dakara ne~ | 2010-08-13 | 6.40 (12) |
| Onee-chan Hunters! Boku-tachi o Koufun Saseru Onee-chan ga Waruinda! Tokonatsu Beach Hen | 2016-08-05 | 6.60 (55) |
| Onee-chan Hunters! Boku-tachi o Koufun Saseru Onee-chan ga Waruinda! Natsuyasumi Hen | 2012-10-04 | 6.60 (68) |
| Onee-chan Eroero Chuuihou ~Aieki no Daikouzui~ | 2011-06-24 | 6.50 (30) |
| Onee-chan Cube | 2003-07-25 | - (4) |
| Onee-chan Change | 2009-03-19 | 6.30 (7) |
| Onee-chan (tachi) wa Osewa Saretai! | 2023-06-30 | 6.40 (42) |
| Onee x Shota | 2012-02-24 | 6.40 (32) |
| Onee no Koisuru Nanokakan ~Manatsu no secret love~ | 2018-08-10 | - |
| Onedari ☆ Princess ~Ecchi no Obenkyou = Sasutte Kosutte Kosutte Sasutte~ | 2008-01-25 | 6.10 (11) |
| Onedari Sweetie ~Koi no Oironashi wa Nando de~ | 2003-11-28 | 7.00 (11) |
| Onedari Suru made Yatte Yaru Origosino...4th | 2010-11-19 | - |
| Onedari Shitekuru Eroi Kyonyuu Hitozuma ni Nando de mo Nakadashi Dekiru Seikatsu ~Ero Kyonyuu Hitozuma no Noukou Chijo Play Nakadashi Haramase Gohoushi~ | 2012-08-28 | 6.00 (15) |
| Onedari Shinasai Onii-sama "Imouto ni Dou Yatte Ijimeraretai no?" | 2013-06-28 | 6.00 (25) |
| Onedari ShareMate | 2014-04-25 | 6.40 (39) |
| Onedari Onapet | 2009-07-31 | 6.20 (7) |
| Onedari Milk Princess | 2004-11-26 | 6.00 (14) |
| OneLove ~ONE LOVE~ | 2006-04-02 | - (1) |
| OneLove R ~ONE LOVE Recover~ | 2007-02-04 | - (3) |
| OneDayOne | - | - (1) |
| One-Hit Wonder | - | - (3) |
| One-Eyed Lee: Prologue | 2017-06-17 | 6.10 (7) |
| One-Eyed Lee and the Dinner Party | 2019-12-18 | 6.50 (11) |
| One, Two, Three Fiancées?! | 2023-09-25 | - (2) |
| One's Own [or very] | 2000-09-15 | - (2) |
| One's Lonesome, Two's Company | 2018-11-02 | 6.90 (28) |
| One's Inside | 2012-10-07 | - (2) |