[Studio Kyawn (Murakami Masaki, Sakaki Shigeru)] Jikken Ningyou ~FAFNER in the azure~ (Soukyuu no Fafner)
Tomodachi no Youna Otaku Kouhai to Deisui Ecchi
Takion to himitsu jikken# 1
(C80) [Karibian (Keraton)] Seirogan Jikken (Touhou Project)
You are My Experimental Dragon | Kimi wa Boku no Jikken Ryu
[LOFLAT (Prime)] Maid to Kouhai Dochira ga Okonomi? | MAID vs KOUHAI: Which Do You Prefer? (Fate/Grand Order) [English] [2d-market.com] [Decensored] [Digital]
Kouhai Kanojo no Seiteki na Jikken
Saenai Heroine Series Vol. 9 Saenai Kouhai no Jishukurikata
Watashi dake no Kouhai
Gendai Succubus no Osex Kenshuu -Namaiki Kouhai to Majime Senpai Hen-
(C93) [Labomagi! (Takeda Aranobu)] Netorare Kouhai Kanojo ~Shiranu Ma ni Ubaware Okasareta Shitai~
Kouhai-chan to Houkago Ecchi!
[Kanbotan (Yuchi)] Aru Hi no Dekigoto ~Saimin Jikken~
[Rivajima (Yajima Index)] Mata Kouhai ni Buruma Kisasete Oshiri no Ana made... Senpai wa Mou Dame desu! (Amagami)
[Furuya] Sherry-chan Kouhai jikken kiroku [SMDC] [English]
[Pin-Point] [Full Color seijin ban] Ijou Chitai ~Kanojo wa Boku no Jikken Dorei~ Kanzenban
Shortcut de Megane no Niau Hitonatsukoi Beit no Kouhai ga Yarichin Douryou no Kuruma de Okurarete kara Mudankekkin Shiteiru + Omake
[Athome Shuka (Takunomi)] Enjo Kouhai Swimming Costume [Chinese] [Digital]
Pachouli-sama Maryoku Jikken
[R-gen] Seishoku Kaihatsu Torawareta Elf no Choukyou Jikken | Sexual Development - Torture Training of Captured Elf (Mesu Hana ga Ochiru Toki) [English] [MTL] [Digital]
(C75) [Otomekibun (Sansyoku Amido.)] Gakkou de Seishun! -Kouhai mo Issho-
Sousakan Saya Zombie tono Kouhai Jikken
(C78) [slice slime (108 Gou)] Kairakuteki Jikken Souchi (Shoujo Kakumei Utena)
(COMIC1☆12) [ELHEART'S (Ibuki Pon)] Hadaka Apron no Bou Kouhai to Ichaicha Suru Hon (Fate/stay night)
Netorarete Shunkashuutou ~Amae Jouzu na Kawaii Kouhai to no 1-nenkan~
[Himawari no Tane] Yuri Couple no Youji Taikou Junyuu Omorashi Amayakashi H + Bukatsu no Senpai o Seiteki ni Amayakasu Kouhai-chan
Shinjin Kouhai Kiriko-san
Kouhai Maid ga Osewa o Shite Kureru You desu | My Kouhai Maid is Looking After Me (decensored)
Boku no Mash no Kouhai Ryoku
Enjo Kouhai 12
[Arakure] Jelly Multiplication (Naedoko ni Sareta Shoujo-tachi no Ishukan Kouhai Kiroku Vol. 2) [Chinese] [濛濛1汉化] [Digital]
[Chiba Tetsutarou] Wadatsumi-sama (Naedoko ni Sareta Shoujo-tachi no Ishukan Kouhai Kiroku Vol. 2) [Chinese] [翠星石汉化] [Digital]
Gudako to Dosukebe Kouhai no Futanari Jijou
Senpai and Kouhai + Extra
(C95) [Kuma no Ana (Shirokuma A)] Gudako to Dosukebe Kouhai no Futanari Jijou (Fate/Grand Order)
Mental Cube Jikken ni Okeru Jiko Narabi ni Higai Houkokusho
Kouhai JK ni Seigangu ni Sarechau Hanashi
[Tohgarashi Hideyu] Dokidoki Jikken Note Ch. 1-4
Senpai ni Jibun ga Mesu de Aru Koto o Wakarasareru Kouhai Zoku
[Okunoha] Fukkou!? Ishu Kouhai -Mazoku to Ningen no Kyousei Jidai- 6-wa [Chinese] [Kirin个人汉化] [Digital]
Kouhai-kun no Okazu ni Naru Onnanoko
Rikutsuppoi Kouhai-chan to Rikutsunuki de Majiwaru made no Hanashi
(C88) [Nagiyamasugi (Nagiyama)] Hifuu Ryoujoku 4 Renko Okusuri Jikken (Touhou Project) [Chinese] [CE家族社]
[Nigiri Usagi] Senpai ni Jibun ga Mesu de Aru Koto o Wakarasareru Kouhai Zoku [Zenpen] | 被前輩教做人認清自己是雌性的後輩·續【前編】[Chinese] [天帝哥個人漢化]
[Triangle! (Maple, Yami Satori)] Kurage Musume-chan no Amaama Aigan Kouhai Nikki [Digital]
Ecchi na Kouhai-chan
(C95) [Asanebou Crisis (Akaneman)] Kouhai Nanpa Beach Luluhawa (Fate/Grand Order)
GIRL - Kouhai Kanojo Soushuuhen
(C92) [SSB (Maririn)] Kojin Satsuei 19-sai Kareshi Mochi Kouhai-kei Kyonyuu Layer (Fate/Grand Order)
Nino-san to Kaze to Yarichin Kouhai
Tensai Jikken
Kouhai Danshi ni Netorare SEX
[Asmodeus Seiyaku (Isogani)] Kajuun Bokujou no Jikken ~Maaya-kun o Juukan Shichaou~ [Digital]
[Ryoumoto Hatsumi] Renai Kagaku Jikken - A Scientific Experiment for Love
Kouhai no Tangan-chan
[Akuochisukii Kyoushitsu (Akuochisukii Sensei)] Koori no Senshi Blue Icicle Chijoku no Sennou Jikken Chuuhen [Chinese] [新桥月白日语社]
(C94) [Rodiura. (Rage)] Kouhai-chan ni Eroi Koto Sareru Hon 6
Tomodachi to Jikken Shite Miru Hon. Zenpen
Atarashii Jikken
(C94) [Athome Shuka (Takunomi)] Enjo Kouhai 6 [English] [biribiri]
(C88) [Nagiyamasugi (Nagiyama)] Hifuu Ryoujoku 4 Renko Okusuri Jikken (Touhou Project)
Kouhai Danshi ni Netorare SEX 2
Hora Hora Senpai Koko ni Kawaii Kouhai-chan ga Imasu yo?
[Wolf whistls] Shinkai Ranman Mayuri no Goumon Jikken-shitsu (Bleach) [Chinese] [有条色狼汉化]
(C92) [Makuu Gundan (Shinozuka Atsuto)] Ganbaru Kouhai (Fate/Grand Order)
[Aimaitei (Aimaitei Umami)] Kurogal Kouhai Otokonoko DeliHeal ~ Gyaku Anal Course [English] [mysterymeat3] [Digital]
[Aimaitei (Aimaitei Umami)] Kurogal Kouhai Otokonoko DeliHeal ~ Gyaku Anal Course (Fate/Grand Order) [Digital]
Astolfo Cos no Kouhai Uriko to Kaijou de Sex Shita Hanashi | 和COS阿斯托尔福的学弟♂销售员在会场一起做爱的故事
(C71) [Tsurukiya (Mutsuki Ginji)] Tensai Jikken (KiMiKiSS)
Zenra Roshutsu Haikai Onanie ni Dohamari Shita Hentai Kouhai Mash Kyrielight
[Somejima] Ishu Kan Kouhai Bokujou | Interracial Rape Breeding Farm (Bessatsu Comic Unreal Ningen Bokujou Hen Vol. 2) [English] [Kizlan] [Colorized] [Digital]
Senpai Kouhai a Man and Woman's Circunstances
Enjo Kouhai
Kouhai-san. To no Natsuyasumi
[Oroneko] Kaikan♥Jikken (COMIC Tenma 2015-06) [English] {NecroManCr}
Masaka Ano Kawaii Kouhai ni Nekomi o Osowareteita nante
[Mimics (Crimson)] Koakuma na Kouhai no Les Dorei ni Sareta Majime na Fuuki Iinchou
Kyonyuu Sentai Sangalkan Green Hentai Mask Jikken Hen Yontarou