| Kukkoro! - Package Edition | r49053 | 2026-05-09 |
| KukkoroDays | r71237 | 2026-05-16 |
| KukkoroDays | r127501 | 2026-05-07 |
| KukkoroDays | r120719 | 2026-04-21 |
| KukkoroDays - R18 Patch (Uncensored) | r88221 | 2026-04-21 |
| Kuma no Kioku -Infant- | r89956 | 2026-05-09 |
| Kumitantei: Old-School Slaughter Demo Version | r130284 | 2026-04-21 |
| Kumitantei: Old-School Slaughter [Episode 1] | r141021 | 2026-04-23 |
| Kumo Tsukai | r53605 | 2026-05-06 |
| Kumo no Ito Hibiki no Baai | r97141 | 2026-05-10 |
| Kumpul Kebo Dengan Teman ♂♀ Dan Berhubungan S+ks, Tanpa Diketahui Pacar! | r138566 | 2026-04-21 |
| Kunado Chronicles | r104725 | 2026-05-08 |
| Kunado Chronicles | r112580 | 2026-04-21 |
| Kunado Chronicles - Censored Edition | r104722 | 2026-04-21 |
| Kunado Kokuki | r97027 | 2026-04-21 |
| Kunado Kokuki - Package Edition | r82339 | 2026-05-07 |
| Kung-fu Kuunyan! | r39003 | 2026-05-08 |
| Kunoichi Ayame ~Enjuku Seida Inbu~ Package Edition | r23881 | 2026-05-13 |
| Kunoichi Ban - Download Edition | r18690 | 2026-05-11 |
| Kunoichi Ban - Trial Edition | r18691 | 2026-05-07 |
| Kunoichi Otoshi ~Kairai to Narihateru Onna Ninja-tachi~ Package Edition | r145946 | 2026-05-11 |
| Kunoichi Torimonochou | r22085 | 2026-05-14 |
| Kunoichi Torimonochou | r71795 | 2026-05-14 |
| Kunoichi Trainer HD [v0.27.1] | r106108 | 2026-04-21 |
| Kunoichi Trainer [v0.27.1] | r75954 | 2026-05-10 |
| Kunoichi Trainer [v0.27.1] [Patron version] | r135511 | 2026-04-21 |
| Kunoichiban! - First Press Limited Edition | r20169 | 2026-05-16 |
| Kuon no Kanata | r81798 | 2026-05-07 |
| Kuon no Kizuna Sairinshou -Portable- | r15781 | 2026-05-07 |
| Kupala - Demo | r143526 | 2026-05-16 |
| Kupala - Demo | r142492 | 2026-04-21 |
| Kupidon | r63593 | 2026-05-08 |
| Kura - DVDPG | r20171 | 2026-05-15 |
| Kura Kura High | r102891 | 2026-04-21 |
| Kurai Nichiyoubi - Sombre Dimanche | r35937 | 2026-04-21 |
| Kuraibito - Download Edition | r41048 | 2026-05-09 |
| Kurano-kunchi no Futago Jijou | r116263 | 2026-04-21 |
| Kurano-kunchi no Futago Jijou - First Press Limited Edition | r21931 | 2026-05-10 |
| Kurazaki Sakuna no Uwaki Chousa ~Netorare Tsuma no Midara na Kahanshin Jijou~ Package Edition | r114131 | 2026-05-11 |
| Kuremutsu no Hajimari | r31486 | 2026-05-16 |
| Kurenai Damashii | r19509 | 2026-05-10 |
| Kurenai Kagura - Additional Scenario + Visual Fan Book | r26366 | 2026-05-09 |
| Kurenai ni Somaru for iOS & Android | r53138 | 2026-05-16 |
| Kurenai ni Somaru ~Chapter 1 「Tsunagu Mono」~ Download Edition | r53129 | 2026-05-14 |
| Kurenai no Tsuki - Trial Edition | r36133 | 2026-04-21 |
| Kurenai no Tsuki -Izayoi Ban- | r18652 | 2026-05-13 |
| Kurenai no Tsuki -Izayoi Ban- Trial Edition | r18653 | 2026-05-15 |
| Kuresaki Gakuen's STORY | r85434 | 2026-05-15 |
| Kurikuri Click 1 ~Liburan musim panasku~ | r148180 | 2026-05-15 |
| Kurikuri Click! Tokumori! ~Ore no Oshiri Tower!~ | r122298 | 2026-05-15 |