Koga Ryouhei Prelfillust

COMIC HOTMILK 2019-03 [Digital]

(C71) [Circle Daiinma (Akutsu Shun, Kogaino, Neo)] Suki to Tokimeki to Kiss (KiMiKiSS)

COMIC Masyo 2018-04 [Digital]

[NAGIYAMASUGI] SANAKOGAEROHON

BUSTER Comic 2015-09

[R-Koga] Nantentatte Jr. Rival -side A & B-

[R-Koga] Loli Soapland Series [Digital]

(C75) [abgrund (udk)] Taru Yume 0 (Narutaru) [Chinese] [Incomplete]

[Anthology] Digital Puni Pedo! Vol. 10

[R-Koga] Seijyo no Izumi

COMIC Megastore 2006-11

[molefoneus (Koga Chiharu)] m.works vol 1 [Digital]

(brilliant days3) [Snobbism (Chiitake)] Koi no Chaban Gekijou (Ensemble Stars!)

COMIC Megastore Alpha 2015-07

COMIC Megastore Alpha 2013-10

COMIC Megastore 2006-11

[Konnyaku Nabe (magifuro Konnyaku)] Odoroki no Kogasa dezumu (Touhou Project) [Digital]

(SC2015 Summer) [Seven Days Holiday (Shinokawa Arumi, Koga Nozomu)] Bell-kun wa Uwakimono | Bell-kun Is A Cheater! (Dungeon ni Deai o Motomeru no wa Machigatteiru Darou ka) [English] [hopeless408]

Comic Megastore 2001-02

[Chuuni + Out Of Sight] M@STER OF PUPPETS 02 (idolmaster)

[R Koga] Tsukumimi 2

COMIC HOTMILK 2017-04 [Digital]

COMIC HOTMILK 2016-10 [Digital]

COMIC XO 2009-04 Vol.35

Tsukioka Kogane no Special Hatsutaiken

Suwarete Nomarete Kogasa-chan | Kogasa-chan Gets Sucked in and Swallowed

[Sugusoko (Yuma Ryouhei)] Disga Suki nan D2 (Disgaea D2) [Digital]

[Anthology] From the Moon 3 (Bishoujo Senshi Sailor Moon)

COMIC XO 2008-04 Vol.23

COMIC Megastore 2010-11

[CELTRANCE (Kogaku Kazuya)] Mama Hame Sex (Tsuya) [Digital]

BUSTER COMIC 2015-09

COMIC Megastore 2001-09

COMIC Megastore 2005-06

Succubus School Life 1-nensei Hen

COMIC Megastore 2007-09

COMIC Masyo 2016-05

(SC56) [AMAGI AN IRONWORKS (Ebisu)] Laboratory Animals + Hermaphroditism = Passion. (Medaka Box)

(C75) [abgrund (udk)] Taru Yume 4 (Narutaru)

[Anthology] Tsuyokikko - This Girl Is Tsundere!

Surprise Meister KogaNue

[Ah! Megami-sama!] Yah!! My Goddess (Tenny-le-Tai)

Kimi ni Deawanakereba Mou Sukoshi Matomo datta

(Reitaisai 7) [Gekka Bijin (Ero Murasaki)] Kogasa-chan Masochism (Touhou Project)

COMIC Megastore 2006-12

[Kouka Ryouhei (Yanagi Kyouei)] El-tentacle Birth Lady’s Mk.B ex.other [Digital]

[Kogaino] Yabakune

(COMIC1☆10) [Seven Days Holiday (Shinokawa Arumi, Koga Nozomu)] Kono Subarashiki Sekai o Mou Ichido - Wonderful World Once Again (Kono Subarashii Sekai ni Syukufuku o!) [Chinese] [绅士仓库汉化]

COMIC Megastore 2007-03

Hinyuu Koakuma Suima & Inmu

COMIC Momohime 2004-05

COMIC Megastore Alpha 2014-11

[MATSUBAYA Corporation

COMIC Megastore Alpha 2015-05

COMIC Masyo 2015-07

(777 FESTIVAL 2nd) [Seven Days Holiday (Shinokawa Arumi, Koga Nozomu)] Ume Zanmai (Tokyo 7th Sisters)

COMIC Masyo 2011-08 [Digital]

Kogane to Pr

COMIC Masyo 2017-11 [Digital]

[R-Koga] Tsukumimi 2 [English] [Tonigobe] [Decensored]

COMIC Megastore 2006-09

(C75) [CELTRANCE (Kogaku Kazuya)] Seigeki Shiei! (Lucky Star) [English] [Shinryu]

COMIC Momohime 2005-06

COMIC Megastore 2005-10

[Midnight Muumus (Giu)] Miminari ga Suru to... [English] [Samachan]

BUSTER COMIC 2015-09 [Digital]

(CT7) [Tsurikichi Doumei (Kogawa Masayoshi)] Tenjouin Asuka Only Hon (Yu-Gi-Oh! GX)

[Nabeyashiki (Nabeshiki)] Sakuya to Kogane ga Saimin de AV Debut Suru Hon (THE iDOLM@STER: Shiny Colors) [Digital]

(C95) [Omocha Kaden (Beni Bana)] Saimin Usagi (Seishun Buta Yarou wa Bunny Girl Senpai no Yume o Minai)

[Tenny Le Tai] [Sailor Moon] Silky Moon (one translated story)

COMIC HOTMILK 2016-06

Ane no Kawari ni Namaiki na Futago Shimai o Saikyouiku?

Hinakan Hi! Vol. 07

Gekkan Comic Muga 2004-06 Vol.10

[Kogaku Kazuya] Sign In! [Chinese]

Comic Megastore 2007-01

[R-Koga] Tsukumimi

(Yumeiro ★ Symphony) [Haramushi. (Kasaoka Shinichi)] Kyoukenbyou (Ensemble Stars!)

[Anthology] Kono Hito Chikan Desu! Vol.2

(COMIC1☆4) [Akuten Soushin (Kokutou Nikke)] Shoku☆Shushu! ~Kogasa-chan Jigokuhen~ (Touhou Project)