[Umino Sachi] Amai Soukan | Sweet Relations (Jukubo Yuugi) [English]
Watashi wa Jukensei no Oi to Kankei o Motte Shimaimashita. | I had a Relationship with my Exam Taking Nephew
(C75) [Tsurupeta Kenkyuusho (Various)] Tsurupeta Kenkyuu Houkokusho "Kessen Zenya" - Turupeta Research Report
Mahou Tsukai Sakusei Kenkyuu | Witch's Semen Milking Research
[Gekka Kaguya] Shimai no Kankei | The Relationship of the Sisters-in-Law (Bengoshi -> Futanari -> Namahaishin) [English] [Komori Translations] [Digital]
[Umino Sachi] Dare ni mo Ienai... Ch. 42 - Haitoku no Kizuna | Immoral Relation (COMIC Bazooka 2012-03) [English]
Ironna Kankei - Iro-Ero relationship
[Shiroo] Rugged Relation
[Kawai Shun] Odoru! Shokushu kenkyūjo (Omake manga) | Dance! Tentacle Research Center (Bonus Story) [English]
Love Relation Chapter 3
Binyuchousain Ayako | Busty Researcher Ayako
Gishimai no Kankei The Relationship of the Sisters-in-Law Original Script Uncensored
Two Girl's Suck-Suck Research Note
[Noda Gaku] Abunai Kankei | Dangerous Relationship Ch. 4 [English] ~Leon990 Scanlations~
Zecchou Kenkyuujo | Orgasm Research Facility
[Bai Asuka] Shujuukankei (Master-Servant Relationship) [English] [desudesu]
[Narusawa Kei] Kare Kano Boshuu Chuu! | Relationships Wanted! (COMIC RiN 2010-10) [English] [Sling]
Secret relationship
[Fujiyoshi] Obedient Relation (English)
(SUPER23) [solafana (Nanai)] Sonna Karera no Kankei-sei. | Their Relationship (Free!) [English]
(C78) [Draw Go (Souichi)] Tokumei Research 1999 ~ Maya-chan Shinsou Kaimei File ~ (Occult Academy)
Lavenza to, Tokubetsu na Kankei ni Natta... | My Relationship with Lavenza is Special...
(C93) [S.S.L (Yanagi)] Chaldea Himitsu no Renai Shidou | Chaldea's Secret Relationship Guidance (Fate/Grand Order) [English] [Saint Quartz Scans]
Futanari Relations Ch12
(C84) [Tengudou (Tengudake)] Shujuu no Kankei! - The Relation of Master to Servant (Bakemonogatari) [Decensored]
Bowsette's Research
(C96) [sabacan (Yoito Chimo)] Secret relationship (BanG Dream!) [Chinese] [基德漢化組] [Taiwanese-Hanji]
[yasu] Ibitsu na Kankei ~Manatsu no YariCir Rankou Gasshuku~ - Distorted relationship Ch. 1-2 [English] [DKKMD Translations]
Yuujin A no Soukanzu | Relationship Chart for Friend A
[Napier Sabre (Ryu-Akt)] Relationship (Phantasy Star Portable 2) [Digital]
Love doll~ toy relation~
[1bit (yuyu)] Igyou Seibutsu Zukan Michi no Kenkyuu Kikan Hen I | Illustrated Adulteration of Deformed Organisms: Unknown Research Institution, I [English]
(C77) [Tsurupeta (Various)] Tsurupeta Kenkyuu Houkokusho "Shin Hissatsu Waza no Kyoufu " - Turupeta Research Report
[Zonda] Fellatio Kenkyuubu - Fellatio Research Department | Blowjob Research Club Ch. 3 (COMIC Mugen Tensei 2022-02) [English] [CrinkzScans] [Digital]
relationship -Mother & Son-
Okashi na Kankei | A Sweet Relationship
Kamiyama Koukou Omanko Kenkyuukai Katsudou Kiroku | Kamiyama Highschools Vagina Research Society Activity Record
[Shiranui Research Institute (Shiranui)] Shiranuhi Ninpo cho ichi-kan (King of Fighters, Street Fighter) [Digital]
[Esuke] DOLLS Pure Physical Relationship 4P Leaflet Melon Books
[Chiba Toshirou] Kinkyori Renai | Near Distance Relationship (COMIC Megastore H 2008-03) [English] [Bouyatachi] [Decensored]
Fellatio Kenkyuubu Ch. 3 | Blowjob Research Club Ch. 3
New relations
Himitsu no Kankei | Secret Relationship
Secret relationship
Futanari Kenkyuu Dousoukai | Futanari Research Club
[Maka Fushigi] Short Distance Relationship - The Niece [English] ATF
[Kawai Shun] Odoru! Shokushu Kenkyuujo "Naedoko" Hen | Dance! Tentacle Research Center - Seedbed-hen [English] [solowing]
[Noda Gaku] Abunai Kankei | Dangerous Relationship Ch. 5 [English] [Leon990 Scanlations]
[Aoirobindume (Shourin Kiyoshi)] Na no Nai Kankei | A Relationship Without Name (91 Days) [English] [cryofblood]
Gishimai no Kankei The Relationship of the Sisters-in-Law [Rewrite]
[Kinku] Jiyuukenkyuu Bitch Report | Research Project: Bitch Report! (COMIC LO 2013-09) [English]
(SC23) [Shibakko. (Shibasaki Ako)] RELATION (Fate/stay night) [Chinese]
[Hoshino Fuuta] Pool no Naka - Pool Relationship [English]
[bifidus] Yuri-nee to no Shujuu Kankei | Master and Slave relationship with Yuri-nee (Kimi o Sasou Uzuki Ana) [English] [Redlantern] [Digital]
Dance! Tentacle Research Center - Seedbed-hen
(Tetsusabiiro no Relation 2) [Pometeor (Enotou)] Nanka Kore Naoranainda yo ne (Mobile Suit Gundam Tekketsu no Orphans)
[Aikawa Monako] Kawaru Kankei | Changing Relationship [English] [N04h]