"The world where humans have an estrous cycle"

[Great Canyon (Deep Valley)] Inkou Kyoushi Senkou Koukai&Gaiden Hon① | 음행교사 선행 공개&외전본① [Korean] [실루엣21]

[Great Canyon (Deep Valley)] Inkou SeiKatsu Shidou・ Boyish Kasshoku Karate Musume-Hen | 음행 성활 지도・보이시 갈색 가라테 소녀편

(C95) [Great Canyon (Deep Valley)] Inkou Kyoushi no Saimin SeiKatsu Shidouroku Tachibana Yayoi Hen ~Sensei, Itoshii Ano Hito no Tame ni Uchi ni Okodane Tsuketatte Kudasai...~ [Spanish] [Dartex]

[Great Canyon (Deep Valley)] Inkou Kyoushi no Saimin Seikatsu Shidouroku ~Fujimiya Megumi Hen~ "Sensei...Kare no Tame ni Watashi no Shojomaku, Kantsuu Shite Kudasai" [Spanish] [Dartex] [Digital]

[Great Canyon (Deep Valley)] (C95) Inkou Kyoushi no Saimin SeiKatsu Shidouroku Tachibana Yayoi Hen - Sensei, Itoshii Ano Hito no Tame ni Uchi ni Okodane Tsuketatte Kudasai… - [korean]