| Katawaguruma to Yukionna | 2009-12-30 | - (4) |
| Katawara | 2011-10-01 | - (3) |
| Katawarebito | - | - |
| Katayoku no Tenshi | 2003-12-19 | 6.10 (6) |
| Kate | 2023-09-10 | - (1) |
| Kate | 2023-08-24 | - (3) |
| Kate Don't Wait | 2021-11-03 | - (1) |
| Katei Houmon | 2007-04-13 | 6.50 (25) |
| Katei Kyouin - Jugyouryou wa Karada de- | 2022-02-25 | 6.70 (18) |
| Katei Kyouin ~Sensei no Ecchi na Gohoubi~ | 2022-01-28 | 6.50 (28) |
| Katei Kyoushi Kasuga Kazuki | 2013-10-17 | - |
| Katei Kyoushi Series VOL.1 Miki | 1997-07-17 | - |
| Katei Kyoushi no Onee-san ~H no Hensachi Agechaimasu~ | 2005-04-28 | 7.50 (91) |
| Katei Kyoushi no Sensei ~Watashi Dake ni O-shi-e-te~ | 2007-10-05 | - (2) |
| Katei Kyoushi to Gakkyuu Iinchou no Osawari na Kankei | 2012-12-21 | - |
| Katei Kyoushi wa Majo Sensei! ~Kojin Jugyou wa H Juushi de~ | 2008-07-25 | - |
| Katei Kyoushi x Saimin 2 ~Zettai Juujun, Takabisha Shimai o Dosukebe Inran ni Saimin Sousa~ | 2022-07-29 | 7.60 (129) |
| Katei Kyoushi x Saimin ~Zettai Juujun, Wagamama JK to Haiso Tsuma o Saimin Sousa~ | 2019-08-30 | 7.30 (173) |
| Katei Kyoushi: Tutor privado | 2023-01-14 | - (2) |
| Katei Saien Maid Hata 2 ~Nanao~ | 2004-10-25 | - |
| Katei Saien Maid Hata ~Yayoi~ | 2004-07-29 | - |
| Kateinai Choukyou | 2004-01-23 | 6.50 (5) |
| Kateinai Koubi | 2008-01-21 | - (1) |
| Katekyo Shichao! ~Hitotsu Yane no Shita, Muhyohyo Gasshuku Monogatari~ | 2018-02-16 | 7.40 (112) |
| Katekyo na Onee-san to Boku Ikenai Kojin Lesson | 2013-11-01 | 6.70 (28) |
| Katekyo ~ Life | 2009-08-07 | 6.50 (19) |
| Katekyo ~Akaruku Tanoshiku Koku Ecchi~ | 2000-09-08 | - (2) |
| Katekyo! ~Oshiete Ecchi na Koto~ | 2007-06-18 | - (3) |
| Katekyo's first date | 2023-05-26 | - |
| Katensai Jikkou Iinkai | 2008-08-27 | - (2) |
| Katesai no Tomato Batake -Seieki Saibai- | 2010-09-26 | - |
| Katherine | 2006-03-20 | 4.90 (16) |
| Katheryn, how would you know? | 2023-03-13 | - |
| Kathoey | 2021-10-18 | - (2) |
| Katie's Corruption | 2020-04-03 | 5.90 (39) |
| Katsubou no Sono ~Hitozuma Shokushu Jigoku~ | 2006-11-18 | 6.10 (6) |
| Katsute Arishi Hi | 2012-05-09 | - (4) |
| Kattobi! | 2003-08-29 | - (2) |
| Katya | 2017-12-04 | - (3) |
| Kau | 2007-05-17 | - (2) |
| Kau Rakkasora ni Kaerazaru Koto | 2023-10-06 | - (3) |
| Kavaya Local Maximum | TBA | - |
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| Kawaii Adobenshaas in Anime Rando | 2009-05-19 | 4.40 (23) |
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| Kawaii Kawai-kun | 2014-02-11 | - |
| Kawaii Kingdom | 2020-05-29 | - (1) |