(C58) [Keiji in Cage (Azamino Keiji)] Yasoukyoku (Chrono Cross)
[Seiji Matsuyama] Ura Eiken ZERO (Eiken)
[Matsuyama Seiji] Eiken Rensai Kaishi 10-shuunen Kinen Bon Kaiteiban Sai (Eiken) [Digital]
[Matsuyama Seiji] 50-sai no Haha ga Erosugite Nakadashi Sex o Shite moratta Doutei no Boku [Digital]
[Matsuyama Seiji] Otona no Eiken Kirika ~Chibukuro yori Ai o Komete~ | Eiken Adult Kirika ~With Love From the Milk Bags~ (Eiken) [English] [Digital]
(CR31) [Keiji in Cage (Azamino Keiji)] Lovely Mix (Full Moon wo Sagashite)
[Matsuyama Seiji] Eiken Makaizou 2 (Eiken) [Digital]
[Matsuyama Seiji] 50-sai no Haha ga Erosugite Nakadashi Sex o Shite Moratta Doutei no Boku. [English] [Fated Circle] [Digital]
[silver dog] Akuyaku Reijou ni Yotogi o Meijiraremashita (Otome Game no Hametsu Furagu Shika Nai Akuyaku Reijou ni Tensei Shite Shimatta...) [Chinese]
(C62) [Keiji in Cage (Azamino Keiji, Hinase Kazusa, Kageno Illyss)] Around The Secret