COMIC Penguinclub Sanzokuban 2002-10
(C73) [OVACAS (Hirokawa Kouichirou)] Banchou Densetsu (Minami-ke)
(C83) [OVACAS (Hirokawa Kouichirou)] Buratei Heart. (Joshiraku)
(C90) [Hooliganism (Murasaki Syu, Hirokawa Kouichirou)] Kono Subarashii Demi-chan no Demi Sauce! (Demi-chan wa Kataritai, Kono Subarashii Sekai ni Syukufuku o!)
(C65) [INFINITY-FORCE (Various)] BL Are Go!! (Machine Robo Rescue)
(SC27) [Hirokaworld (Hirokawa)] 15/21 (3-nen B-gumi Kinpachi Sensei Densetsu no Kyoudan ni tate!)
[Hirokaworld (Hirokawa)] petta
(C62) [KNOCKOUT (Various)] Oshiri de Kyu! 7 (Various)
(CR27) [Dangan Densetsu Laser (Hirokawa Tomo, Nerima Yoshito)] Kairaku Gensoku Hagurumashiki Soutei Souchi (Revolutionary Girl Utena)
[Otonano Omochiya (Hirokawa)] Otonano Omochiya Vol. 15 [English]
(SC32) [OVACAS (Hirokawa Kouichirou)] another day (Ojamajo Doremi)
Otonano Omochiya 12 Futaba no Ohanashi Matome 2
[OVACAS (Hirokawa Kouichirou)] Kashi 1114 (Ojamajo Doremi)
Otonano Omochiya 12 Futaba no Ohanashi Matome 12
[Yumeizukosya, OVACAS (Hirokawa Kouichirou)] Ebisu Taisen (Sakura Taisen)
Men's Dolphin 1999-11-01 Vol.03
After School XX Time
[Anthology] Love Chara Taizen No. 7 (Various)
Otonano Omochiya Vol.6 - Ch.4-5
Hungar x Hungar One Pause (Hunter x Hunter One Piece)
Otonano Omochiya Vol.13
Pachie-bon
(C81) [OVACAS (Hirokawa Kouichirou)] SUITE&BITCH (Suite Precure)
(C71) [OVACAS (Hirokawa Kouichirou)] BITCH STYLE (WITCHBLADE)
(Puniket 12) [OVACAS (Hirokawa Kouichirou)] Sensei dazo! (Pani Poni Dash!)
Otonano Omochiya Vol. 15
[Shuudan Bouryoku (Murasaki Syu)] Takanashi-san-chi no 4 Shimai - 1 (WORKING!!)
(CT20) [OVACAS (Hirokawa Kouichirou)] Bouhatei no Onna. (Joshiraku)
(C62) [Knockout (Various)] Oshiri de Kyu! 7 (Various)
(CSP5) [OVACAS (Hirokawa Kouichirou)] Haru Matsuri Chichi Matsuri 2010 (Various)
COMIC Penguinclub Sanzokuban 2003-01
[Hirokawa Kouichirou] Deep Trip
(C62) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 4 Sokuon (Azumanga-Daioh)
(COMIC1☆2) [OVACAS (Hirokawa Kouichirou)] Kurobeta (Minami-ke)
Two Toned Romps
(C72) [Ovacas (Hirokawa Kouichirou)] Lucky Punch (Lucky Star)
[Otonano Omochiya (Hirokawa)] Otonano Omochiya 3 Kan
COMIC Penguin Club Sanzokuban 2000-09
(C80) [OVACAS (Hirokawa Kouichirou)] A STYLE. (A Channel)
Otonano Omochiya Vol.6 - Ch.4
Otonano Omochiya Vol. 14
(C69) [OVACAS (Hirokawa Kouichirou)] 1-NEN C-GUMI MAHOGUMI (Pani Poni)
(C56) [Doudan Tsutsuji (Doudantsutsuji, Hirokawa Tomo)] Getten! (Mamotte Shugogetten)
[Amatoro Bow] Hanarete Ite mo Hito ni Fureru Otoko
(Puniket 19) [Hirokaworld (Hirokawa)] Shiikibi (Various)
(SC16) [Ovacas (Hirokawa Kouichirou)] Nichiyou Asa no 8-ji 30-bu (Ojamajo Doremi)
Otonano Omochiya Vol. 14
(C79) [OVACAS (Hirokawa Kouichirou)] Tenshi(Bitch) ni Love Song o! (Panty & Stocking with Garterbelt)
(C66) [OVACAS (Hirokawa Kouichirou)] OVACAS SKETCH 5 (Pretty Cure)
(Tougetsu-sai) [OVACAS (Hirokawa Kouichirou)] IYASI-K (Pani Poni)
(C78) [OVACAS (Hirokawa Kouichirou)] Love Style Plus (Love Plus) [English] [shakuganexa]
[Otonano Omochiya (Hirokawa)] Otonano Omochiya Vol. 16 [Chinese]
Otonano Omochiya Vol. 13
[OVACAS (Hirokawa Kouichirou)] Gakuen Erotopia Kaiteiban (Manabi Straight!)
COMIC Penguin Club Sanzokuban 2001-08 [Incomplete]
(C63) [OVACAS (Hirokawa Kouichirou)] Shirobom (Bomberman Jetters)
(C76) [OVACAS (Hirokawa Kouichirou)] Houkago XX Time (K-ON!)
Otonano Omochiya Vol. 15
(C78) [Shuudan Bouryoku (Murasaki Syu)] Hooliganism 17 Record of ALDELAYD Act.12 Exhibition DX9 (English) =LWB=
COMIC Penguinclub Sanzokuban 2003-08