[Hirokawa Kouichirou] A to Z [広川浩一郎] A to Z

(C78) [OVACAS (Hirokawa Kouichirou)] Love Style Plus (Love Plus) [English] [shakuganexa]

(C75) [Ovacas (Hirokawa Kouichirou)] Ovacas Style 2008 (Kannagi, Queen's Blade, Strike Witches)

(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star)

[Hirokawa Kouichirou] Deep Trip | 銷魂之旅 [Chinese]

(COMIC1☆2) [OVACAS (Hirokawa Kouichirou)] Kurobeta (Minami-ke)

[OVACAS, Abellcain (Hirokawa Kouichirou, Fujimaru Arikui)] Deep impact (Cosmic Baton Girl Comet-san)

(C83) [OVACAS (Hirokawa Kouichirou)] Buratei Heart. (Joshiraku)

(C80) [OVACAS (Hirokawa Kouichirou)] A STYLE. (A Channel)

(C81) [OVACAS (Hirokawa Kouichirou)] SUITE&BITCH (Suite Precure)

(C79) [OVACAS (Hirokawa Kouichirou)] Tenshi(Bitch) ni Love Song o! (Panty & Stocking with Garterbelt)