[Oyama Yasunaga] Iyarashii Hanashi
[Oyama Yasunaga] Dokkin Clinic
[Oyama Yasunaga] Costume Play Magician
[Oyama Yasunaga] Seifuku Shojo Tengoku
[Oyama Yasunaga] Puff Puff Parfait
[Oyama Yasunaga] Nupu Nupu Nuppun
[Oyama Yasunaga] Moeyo! Boinken
[Oyama Yasunaga] Kichiku Kazoku (Cruel Beast Family)
[Oyama Yasunaga] Joshikousei Rinkan
[Oyama Yasunaga] Kahanshin Jugyou (Teaching About the Lower Half of the Body)
[Oyama Yasunaga] Puff Puff Parfait
(C61) [Koutarou With T (Koutarou, Oyama Yasunaga, Tecchan)] GIRL POWER Vol.9 (Dirty Pair)
[Koutarou With T] GIRL POWER 14 (Air Master)