(C64) [Koutarou with T (Koutarou, Tecchan, Oyama Yasunaga etc] GIRL POWER Vol.14 (Air Master) Hentai (C64) [こうたろう with ティー (こうたろう, てっちゃん, 尾山泰永 他)] GIRL POWER Vol.14 (エアマスター)

(CR36) [Koutarou With T (Koutarou, Oyama Yasunaga, Tecchan)] Girl Power Vol. 19 (Various)

(CR33) [Koutarou With T (Various)] Girl Power Vol. 13 (Various)

(C61) [Koutarou With T (Koutarou, Oyama Yasunaga, Tecchan)] GIRL POWER Vol.9 (Dirty Pair)

[Koutarou] B☆B☆IDOL expansion!!

(C66) [Koutarou With T (Koutarou, Oyama Yasunaga, Tecchan)] GIRL POWER Vol.18 (Dead or Alive)

[Akiba Maou (Akiha@, Ikegami Ryouichi, Oyama Yasunaga, Tecchan)] Senshadou no Musumetachi ga Hiwai na Bitch ni Shiagarimashita (Girls und Panzer) [Digital]

(C68) [Koutarou With T (Koutarou, Oyama Yasunaga, Tecchan)] GIRL POWER vol.21 (Various)

(C62) [Koutarou With T (Various)] GIRL POWER Vol.10 (Urusei Yatsura, Galaxy Express 999, Initial D)

(C67) [Koutarou With T (Koutarou, Oyama Yasunaga, Tecchan)] GIRL POWER vol.20 (CAPCOM)

[Koutarou] B☆B☆IDOL