When I collaborated with that big creator, it turned out to be bad あの大物クリエイターとコラボしたらマズいことになった

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

[Koutarou With T] GIRL POWER VOL.04

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

Onimusha | Girl Power Vol.15 [Koutarou With T]

[Koutarou With T] GIRL POWER Vol.8 (Various)

[Koutarou with T] Mama Cos.[Play01-02-03-04-Final Play]

Giant Robo | Girl Power Vol.7 [Koutarou With T]

[Koutarou] Ritsuko-Sensei no Kojin Jugyou | Big Breasts Teacher, Children's Virginity Hunting Expert. (COMIC Bazooka 2011-12) [English]

[Koutarou with t] Tatakau

(CR32) [Koutarou With T (Various)] Girl Power Vol. 11 (Urusei Yatsura)