(C63) [MUSASABIDO (Bakuchin)] Research of a maid

(COMIC1☆11) [Showa Saishuu Sensen (Hanauna)] Kamiyama Koukou Omanko Kenkyuukai Katsudou Kiroku | Kamiyama Highschools Vagina Research Society Activity Record (Hyouka) [English] [Doujins.com]

[SOUND MILK (Otochichi)] Mahou Tsukai Sakusei Kenkyuu | Witch's Semen Milking Research (Mahou Tsukai Precure!) [English] [ATF] [Digital]

[Ogawa Kanran] Yoi Kono Jiyuu Kenkyuu | Independent Research Time [English] [Jojo]

[Hroz] Succubus no Ningen Kenkyuu | Human Research by a Succubus [English] [thetsuuyaku + 4dawgz]

[Slow Masturbation Research Society] "The seven fundamental operations" [ENG]

[Dokurosan] Eiken Lovers | Movie Research Lovers (COMIC Tenma 2009-05 Vol. 132) [English] [Brolen]

Twilight's Research | 暮光学习计划

Kamiyama Koukou Omanko Kenkyuukai Katsudou Kiroku | Kamiyama Highschools Vagina Research Society Activity Record

Jiyuu Kenkyuu de Ochinchin o Shiraberaremashita | We Decided to Examine a Penis for Our Independent Research

Mahou Tsukai Sakusei Kenkyuu | Witch's Semen Milking Research

Erina-sama no Renai Kenkyuukai. 2 I Erina-sama's love research lab 2

Research of Barnaby Brooks Jr.

Manga Research Triangle

Attack on Research

Dance! Tentacle Research Center - Seedbed-hen

Movie Research Lovers

Zecchou Kenkyuujo 2 | Orgasm Research Facility 2

Two Girl's Suck-Suck Research Note

Bowsette's Research

Futanari Kenkyuu Dousoukai | Futanari Research Club

JS Kenkyuukai | JS Research Seminar

Chinko no Jiyuu Kenyuu | Dick Research Project

[Kawai Shun] Odoru! Shokushu kenkyūjo (Omake manga) | Dance! Tentacle Research Center (Bonus Comic) [English]

[Kawai Shun] Odoru! Shokushu kenkyūjo (Omake manga) | Dance! Tentacle Research Center (Bonus Story) [English]

Zecchou Kenkyuujo | Orgasm Research Facility

Zecchou Kenkyuujo 2 | Orgasm Research Facility 2

Adult Goods Tanchiki ~Machi no Inran Onna o Research Seyo~

Fellatio Research Department | Fellatio Kenkyuubu - Ch.01

Magical Occult Research Girl Defeated

Fellatio Kenkyuubu | Blowjob Research Club Ch. 2

[Zonda] Fellatio Kenkyuubu Ch. 2 | Blowjob Research Club Ch. 2 (COMIC Mugen Tensei 2021-07) [Chinese]【羅莎莉亞漢化】

[Shinsekai Set (Hetaren)] Kurodate o Shiro ni Someru Seishoku Kenkyuu o (Blue Archive) | Sexual Gourmet Research: Dyeing Kurodate White [English] [Douzo Lad Translations]

Fellatio Kenkyuubu Blowjob Research Club Ch. 3

Dokidoki Occult Kenkyuubu | Heart Pounding Occult Research Club