[Yasunaga Oyama] A Slave to Debt
[Oyama Yasunaga] Chitsunai Renzoku Chuunyuu
[Oyama Yasunaga] Kahanshin Jugyou (Teaching About the Lower Half of the Body)
[Oyama Yasunaga] Joshi Kankin Kaizou (Girl Imprisonment Modification) (Chinese)
[Oyama Yasunaga] Cosplay Magician (CN)
[Oyama Yasunaga] Bakunyuu School (CN)
[Oyama Yasunaga] Shojo Hatsutaiken Relay (Full Color)
(C61) [Koutarou With T (Koutarou, Oyama Yasunaga, Tecchan)] GIRL POWER Vol.9 (Dirty Pair)
[Oyama Yasunaga] Chitsunai Renzoku Chuunyuu
[Oyama Yasunaga] Hitozuma a la carte - Married Woman A La Carte | 人妻任你吃 [Chinese]
[Oyama Yasunaga] Nukeru Karada - Sex causing body
[Oyama Yasunaga] Kyonyuu Ichiban Shibori