[Shinobu Tanei] Imouto Shojo Gensou | Little Stepsister Fantasy Virgin Ch. 1-10 [English] {Tadanohito}
[Shinobu Tanei] Little Stepsister Love Space Ch. 1 [English] {Tadanohito}
Twilight's Research | 暮光学习计划
[Kinku] Jiyuukenkyuu Bitch Report | Research Project: Bitch Report! (COMIC LO 2013-09) [English]
Borderless Little Stepsister
[Zonda] Fellatio Kenkyuubu Ch. 3 | Blowjob Research Club Ch. 3 (COMIC Mugen Tensei 2022-02) [English] [Sloppy Seconds] [Digital]
[Shinobu Tanei] Imouto Zettai Ryouiki | Stepsister Absolute [English] {Tadanohito}
Little Stepsister Band-aid - Bonds
Attack on Research
[Noise] Chinko no Jiyuu Kenyuu | Dick Research Project (COMIC LO 2019-05) [English] [Doki Fansubs] [Digital]
(C77) [Tsurupeta (Various)] Tsurupeta Kenkyuu Houkokusho "Shin Hissatsu Waza no Kyoufu " - Turupeta Research Report
[Shinobu Tanei] Little Stepsister Love Space Ch. 1-5 [English] {Tadanohito}
[Minamida Usuke] Dokidoki Eizou-Kenkyuu-Bu | Steamy Cinema Studies and Research Club (COMIC HOTMILK 2017-01) [English] [Digital] [Incomplete]
[Dokurosan] Eiken Lovers | Movie Research Lovers (COMIC Tenma 2009-05 Vol. 132) [English] [Brolen]
[Shiranui Research Institute (Shiranui)] Shiranuhi Ninpo cho ichi-kan (King of Fighters, Street Fighter) [Digital]
Zecchou Kenkyuujo 2 | Orgasm Research Facility 2
Bowsette's Research
[Shinobu Tanei] Little Stepsister Fantasy Virgin Ch. 1-2 [English] {Tadanohito}
Little Stepsister Love Space
[Circle ARE (Kasi)] Ore no Gimai ga Azunyan no Wake ga nai Kan. | There's no way Azusa could be my Stepsister (K-ON!) [English] =TV=
[Azuki Kurenai] BLACK IMPACT - Azuki Kurenai Gengashuu & Fan Book
[Yamada Non] 3P, Hajimemashita! (BOY'S Pierce Kindan 2013-08) [English] [Blissful Sin] [Decensored]
[Matsurioka Hideyuki] Reken ~Shinsoku Raper Domo~ | Rape Researches
Shin Hanzyuuryoku 40
(C75) [Tsurupeta Kenkyuusho (Various)] Tsurupeta Kenkyuu Houkokusho "Kessen Zenya" - Turupeta Research Report
[Shinobu Tanei] Imouto Shojo Gensou | Little Stepsister Fantasy Virgin Ch. 1-9 [English] {Tadanohito}
[San Kento] Koufuku no Plu-san Ch. 6 Yasumiake de Hacchakeru Gal | The blessed Plu-san Ch. 6 - A Gyaru Letting Lose After Summer Break (Mugen ni Kanjiru Onna no Karada) [English] [ChoriScans]
Imouto-sei Time Leap Izonshou 3 | Younger Stepsister Time Leap Dependence 3
[Shinobu Tanei] Little Stepsister Love Space Ch. 1-6 [English] {Tadanohito}
[Kawai Shun] Dance! Tentacle Research Institute [English]
[Shinobu Tanei] Little Stepsister Love Space Ch. 1-11 [English] {Tadanohito}