| Gakuen Hetalia | 2011-03-24 | 6.30 (16) |
| Gakuen Heaven: Boy's Love Scramble! | 2002-08-02 | 7.00 (59) |
| Gakuen Heaven 2 ~Double Scramble!~ | 2014-07-11 | 7.50 (73) |
| Gakuen Harem!! | 1998-07-10 | - (1) |
| Gakuen Handsome: Revolution | 2014-03-03 | 6.40 (7) |
| Gakuen Handsome: Restaurant | 2014-08-04 | 6.10 (9) |
| Gakuen Handsome: Ito Okashi | 2015-01-03 | - (4) |
| Gakuen Handsome: Chocolate | 2014-03-24 | 6.50 (7) |
| Gakuen Handsome | 2010-08-29 | 7.30 (69) |
| Gakuen Hanafuda Gouka Kenran Zenpen | 2011-05-20 | - |
| Gakuen Gekokujou ~Ore ga Akogare no Ojou-sama o Inran Ochi Saseru made~ | 2014-07-25 | 6.10 (21) |
| Gakuen Counselor | 2002-10-04 | - |
| Gakuen Club ~Houkago no Himitsu~ | 2015-05-14 | 5.40 (121) |
| Gakuen Club Triangle ~Seifuku to Shojo to Amai Kaori~ | 2008-12-05 | 6.30 (6) |
| Gakuen Choukyou Iinkai ~Mesukyoushi Injoku no Houkago~ | 2007-09-21 | - (4) |
| Gakuen Caste ~Youmuin Gesuyama no Gyakuten Shihai Seikatsu~ | 2014-07-25 | 6.40 (44) |
| Gakuen Bomber | 1994-04-28 | 5.60 (5) |
| Gakuen Betrayer ~Himitsu no Seitaiken~ | 2011-02-25 | 6.50 (11) |
| Gakuen Benki | 2017-06-04 | - |
| Gakuen Basara | - | - |
| Gakuen Alice ~WakuWaku★Happy Friends~ | 2007-04-19 | - |
| Gakuen Aijoku Sayokyoku ~Owaru Koto no Nai Zetsubou no Utage~ | 2012-11-30 | 6.90 (30) |
| Gakuen 3 ~Karei Naru Etsujoku~ | 2010-08-27 | 7.40 (126) |
| Gaku ☆ Ou -The Royal Seven Stars- | 2012-01-27 | 7.30 (108) |
| Gaku ☆ Ou -It's Heartful Days!!- | 2012-08-10 | 6.90 (50) |
| Gaku Love ~Wagamama na Ponytail~ | 2003-10-31 | 6.30 (5) |
| Gakkyuu Nisshi | 2011 | - |
| Gakkyuu Gangu | 2008-03-14 | - |
| Gakkou no Seiiki | 2016-11-25 | 6.30 (315) |
| Gakkou no Kaidan DS | 2008-07-17 | - (3) |
| Gakkou ni Ikou!! -Lose One's Heart- | 2002-01-18 | - (1) |
| Gakkou ni Ikou! | 2011-11-21 | - |
| Gakkou de Atta Kowai Hanashi | 1995-08-04 | 7.60 (23) |
| Gakkou de Atta Koii Hanashi | 2008-12-29 | - (1) |
| Gakkou Yarashii Kaidan ~Konna Hazukashii Jorei Sasenaide!~ | 2009-03-19 | 6.10 (10) |
| Gakkou Nanafushigi ~Shougakkou no Hanako-san~ | 2004-05-13 | - |
| Gakkou Nanafushigi ~Koukousei no Hanako-san~ | 2016-06-15 | - |
| Gakkou Nanafushigi 5 | 2015-12-15 | - |
| Gakkou Nanafushigi 4 | 2007-02-13 | - |
| Gakkou Nanafushigi 2 | 2000-12-07 | - |
| Gakkou Mizugi ~Semen Pool de Oyoidara~ | 2008-12-26 | 6.00 (18) |
| Gakkou Ero Fushigi Inran Onna Kyoushi | 2023-09-02 | - (1) |
| Gakkoi ~Ai to Noroi to Valentine~ | 2009-12-30 | - |
| Gakkoi 2 ~Unmei Ai wa Inochigake~ | 2009-05-03 | - |
| Gaki no Chi*po ya Arahen de! | 2008-07-31 | 6.70 (13) |
| Gakeppuchi Reijou wa Mukiryoku Akuma de Otome o Sutetai ～Devil's Nightmare～ | TBA | - |
| Gakeppuchi Reijou wa Mukiryoku Akuma de Otome o Sutetai | 2025-08-22 | - (3) |
| Gakeppuchi Kakeibo | 2002-07-12 | - (2) |
| Gajou Kanraku | 2007-02-18 | - |
| Gajja Hateu | 2023-03-25 | - |