[Nishikawa Kou] Imouto no Naka wa Ii mono da [Chinese](4)
- Relation manga
- COMIC Penguin Club 2019-08 [Digital]
- [西川康] お嬢様は恋話がお好き [Chinese]
- COMIC HOTMILK 2020-04 [Digital]
- COMIC Penguin Club 2010-07
- [Nishikawa Kou] Boshi Kan no Susume | Recommendation for Mother and Child Incest - Prologue [English] [Echiisake]
- [Nishikawa Kou] Ojou-sama wa Koibana ga Osuki
- [Nishikawa Kou] Tomodachi no Haha wa Boku no Mono | My Friend's Mother is Mine (Tomodachi no Haha wa Boku no Mono) [English] [Amoskandy]
- COMIC Penguin Club Sanzokuban 2019-05 [Digital]