| Onee-chan to Shota-kun to. ~Naka o Yoku Suru H no Kankei~ Package Edition | r46797 | 2026-05-19 |
| Onee-chan wa Kushizashikou!? ~Atashi no Kui de Tsuranuite Ageru~ DVDPG | r151425 | 2026-05-15 |
| Onee-chan wa Kushizashikou!? ~Atashi no Kui de Tsuranuite Ageru~ Package Edition | r54720 | 2026-05-17 |
| Onee-sama no ♂ (Are) ~Moegi Shinku no Junan!?~ | r8601 | 2026-05-16 |
| Onee-sama wa Hoken'i "Otouto ga Sukisugite, Nakisakebu Hodo Ijimetaku Nacchau no♥" - Download Edition | r27700 | 2026-05-20 |
| Onee-sama wa Hoken'i "Otouto ga Sukisugite, Nakisakebu Hodo Ijimetaku Nacchau no♥" Package Edition | r17661 | 2026-05-15 |
| Onee-san Nakadashi Chikan Ressha - DVDPG | r22709 | 2026-05-06 |
| Onee-san Sensei ~Hoshuu Jugyou no Ecchi na Sensei~ | r116297 | 2026-04-21 |
| Onee-san Sensei ~Hoshuu Jugyou no Ecchi na Sensei~ Download Edition | r62966 | 2026-05-19 |
| Onee-san Sensei ~Hoshuu Jugyou no Ecchi na Sensei~ Package Edition | r61682 | 2026-05-19 |
| Onee-san Technique ~Seikyouiku to Hatsutaiken~ Download Edition | r52607 | 2026-05-20 |
| Onee-san X Scratch | r9687 | 2026-05-07 |
| Onee-san ni Makasenasai! ~Ryoubo to Joushi no Yawaraka Oppai ni Hasamarete~ | r116324 | 2026-04-21 |
| Onee-san to Amaero Milk Kissa ~Shibotte Nonde Ippai Nakadashi Shite ne~ | r64095 | 2026-05-15 |
| Onee-san x Shuffle! ~Tomodachi no Onee-chan no Ecchi na Karada.~ | r116213 | 2026-04-21 |
| Onee-san x Shuffle! ~Tomodachi no Onee-chan no Ecchi na Karada.~ Trial Edition | r54765 | 2026-05-20 |
| Onee-san? wa Akumakko! Makai no Hime wa Shiri-zuri Jouzu de Binkan Manyuu. Sonna ni Kosuccha... Riyameee!! | r148850 | 2026-05-15 |
| Onefold Crush - Prototype | r75791 | 2026-04-21 |
| Onegai - Download Edition | r124477 | 2026-05-20 |
| Onegai @ Countdown | r110613 | 2026-05-20 |
| Onegai @ Countdown Download Edition | r112458 | 2026-05-17 |
| Onegai Naisho ni Shite ne SS | r22884 | 2026-05-10 |
| Onegai O-Hoshi-sama - First Press Limited Edition | r5543 | 2026-05-17 |
| Onegai O-Hoshi-sama - Regular Edition | r14869 | 2026-05-19 |
| Onegai O-Hoshi-sama - Trial Edition | r14868 | 2026-05-16 |
| Onegai Tasukete!! 2 ~Sosogare Tsuzukeru Seieki~ Package Edition | r31102 | 2026-05-17 |
| Onegai ☆ Teacher Soushuu Hen - Package Edition | r49046 | 2026-05-16 |
| Onegai! Iinchou!! | r2349 | 2026-05-08 |
| Onegai! Mou Yamete!! ~Bakunyuu J○ wa XXXX no Nakadashi Nikubenki~ Package Edition | r42564 | 2026-05-10 |
| Onegai! Renhou | r31500 | 2026-05-17 |
| Onegai♪ Goshujin-sama! | r907 | 2026-05-16 |
| Onegai♪ Goshujin-sama! Pack Edition | r72132 | 2026-05-19 |
| Onegai♪ Goshujin-sama! ~Eran Hen~ | r36083 | 2026-05-19 |
| Onegai♪ Goshujin-sama! ~Yayoi Hen~ | r36082 | 2026-05-19 |
| Oneirofobia v1.5.4 | r90076 | 2026-04-21 |
| Onemuri Sister - Package Edition | r7470 | 2026-05-16 |
| Onepapa ~Onegai PaPa!~ | r20597 | 2026-05-16 |
| Onesellf | r101295 | 2026-05-16 |
| Onesellf Connect! | r101296 | 2026-04-21 |
| Oneshota DX4 - Download Edition | r43617 | 2026-05-14 |
| Oneshota Machi no Ecchi na Natsuyasumi - Package Edition | r107375 | 2026-05-15 |
| Oneshota Natsuyasumi | r64901 | 2026-05-20 |
| Oneshota Natsuyasumi | r116704 | 2026-04-21 |
| Oneshota Natsuyasumi - Trial Edition | r59436 | 2026-05-13 |
| Oneulbuteo Donggeo 1il Cha R | r127076 | 2026-05-18 |
| Oneuldo Salangseuleobgae | r82251 | 2026-05-20 |
| One~san Day☆by☆Day | r20596 | 2026-05-16 |
| One~san Day☆by☆Day - Download Edition | r75452 | 2026-05-19 |
| One☆らばー!! ～ミクちゃんの恋人～ ダウンロード版 | r14685 | 2026-04-21 |
| One☆らばー!! ～ミクちゃんの恋人～ パッケージ版 | r11229 | 2026-04-21 |