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(SC60) [Mukousharan (Chiyami)] Tentacle Operation (Vividred Operation)

[Yamada Gogogo] TS Shujutsu Mesu Niku Ishoku Kiroku | TS Operation File On A Female Body Transplant (2D Comic Magazine Seitenkan Shite Haramasarete Botebara End! Vol. 3) [English] [FC] [Digital]

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

(SC61) [Sorairo March (Narusawa Sora)] Sono Gakusai, Inran Otokonoko Kyakuhiki Chuui! [English]

H￮LOX Himitsu Kessha Keiei no Susume 01 | How to operate Secret Society H○LOX-01

[チーズ酵母] 真空病棟 ～vacuum operation～│ドロップブックス

(C86) [tomatohouse905's room (Urabi)] Be United, Please!! Extra Operation ☆ (Arpeggio of Blue Steel, Kantai Collection -KanColle-)

[Studio Nunchaku (Kome Tsubu)] Vividred Jikkenshitsu (Vividred Operation) [Digital]

[Cheeseyeast (Naka)] Vacuum Ward -Vacuum Operation- [Digital]

[Naito Loveca] Hajimete no Kokuhaku (Juicy No. 8 2015-01) [English] {NecroManCr}

(SC58) [L'ARCHANGE (Kagutsuchi)] Vivid Momo Operation no Tame ni Isshiki Shimai ga Tokunou Mayonnaise-mamire de Ganbaru Hon (Vividred Operation)

[Spirit Trilobite] A Doujin From Quite Long Ago (Girl Friend (Beta)) [English] [Venatör]

Twilight's Research | 暮光学习计划

[Studio Nunchaku] Vividred Cums! (Vividred Operation)

[Kawai Shun] Odoru! Shokushu Kenkyuujo "Naedoko" Hen | Dance! Tentacle Research Center - Seedbed-hen [English] [solowing]

[Gekkouya] Manman no Ki [Chinese] [月熙汉化组]

Futanari Kenkyuu Dousoukai | Futanari Research Club

(C68) [Bikkuri Byouten (Oikawa Hechima)] Fumio Nikki (Hani Hani ~Operation Sanctuary)

(C87) [YOU2HP (YOU2)] AkaRei☆Operation (Vividred Operation)

(C82) [nightstalker (Hir)] Change The Operation (Dungeon Fighter Online)

(C86) [Kaiten Sommelier (13.)] Shiritsu Risshin Gakuen Oshiri no Nama Onaho Sakusen. | Private Risshin Academy Operation "Living Anal Sleeve" (Shiritsu Risshin Gakuen ~Seishori Iin Soushuuhen~) [English] [biribiri]

(C95) [I.S.O.P. (Kamui Aya)] OPERATION γ (Azur Lane)

Fellatio Kenkyuubu | Blowjob Research Club Ch. 2

Operation TTT

Manga Research Triangle

(C84) [Kacchuu Musume (Yukiyanagi)] Shingeki no Kenkyuu | Attack on Research (Shingeki no Megami) (Shingeki no Kyojin) [English] [CGRascal]

(COMIC1☆9) [Detox-Girls (Akai Hoya)] ALDNOAH.ERO (Aldnoah.Zero, Vividred Operation) [English] [CGrascal]

[Eroliya (iuro)] Hiyake Daisakusen!! | Operation Suntan!! (iuro no Full Color Soushuuhen 1) [English] =Team Vanilla=

(Tokyo Shock 2) [Operating Room (Puchida)] Honjitsu wa Heiten Itashimashita (Tokyo Ghoul) [English] [EHCOVE]

[Libido (Omoutubo)] Zettai Ryouiki (Starship Operators)

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

(C80) [Maniac Street (Sugaishi, Oono)] Momoiro Operation (To LOVE-Ru)

(COMIC1☆7) [Kaname (Siina Yuuki)] Motto Momotto Motto Operation (Vividred Operation)

[Tokita Alumi] Kisei Jijitsu Daisakusen | Operation Obvious (Canopri Comic 2011-03) [English] [Delicious Oppai]

GUNPARADE MARCH ULTRASONIC ATTACK! FIRST OPERATION. LEVEL E

[Asanoya (Kittsu)] Seishinhoukai Surumade Kusugurimakutte Ryoujoku Shitemiru Test VI -Tarushiri- (Vividred Operation) [Digital]

(CR37) [HYPER BRAND (Ishihara Masumi)] Operation Ragnarok ~Kind Lady~ (Ragnarok Online)

(C64) [Chimatsuriya Honpo (Arashiyama Tsugumoto, Asanagi Aoi)] LEVEL E Plus Gunparade March Ultrasonic Second Operation (Gunparade March)

[Umedama Nabu] Shin Operation Daisakusen TNG

Mahou Tsukai Sakusei Kenkyuu | Witch's Semen Milking Research

[Noise] Chinko no Jiyuu Kenyuu | Dick Research Project (COMIC LO 2019-05) [English] [Doki Fansubs] [Digital]

MONZETSU OPERATION

(COMIC1☆10) [Hisagoya (Momio)] BOKO BOKO OPERATION (Girls und Panzer) [English] {Hennojin}

Pippintopinto Operation

[Tanmatsu Ijou (BadHanD)] Byakko no Mori Sono Hachi [English] {biribiri} [Digital]

Dance! Tentacle Research Center - Seedbed-hen

[Mist Night (Arniro)] Hell Of Swallowed [Operation fail Rei] [English]

(SC60) [Garou Kissa Hapido (Takeshita Kenjirou)] Renai Shoshinsha Mark (Vividred Operation)

(C80) [Digital Accel Works (INAZUMA)] INAZUMA Jiyuu Kenkyuu | INAZUMA Research Project (PreCure) [English] {5 a.m.}

Fellatio Kenkyuubu Blowjob Research Club Ch. 3

[Sanbaizu] Oba-san no Toile o Shita kara Nozoku [English] [Brolen]

Girls und Panties - Initiating Operation FapFap!

(C75) [Tsurupeta Kenkyuusho (Various)] Tsurupeta Kenkyuu Houkokusho "Kessen Zenya" - Turupeta Research Report

[Kameneji] Himawari-chan ga Kodane o Saishu (Vividred Operation) [Digital]

[MEKONGDELTA & DELTAFORCE (Route39, Zenki)] Operation TIGER!! (Fate/stay night)

(Shoku no Kyouen 2) [Operating Room (Puchida)] Touka-chan ga Mezamenai!! (Tokyo Ghoul) [English] [EHCOVE]

(C66) [High-octane (Haioku)] tsuki wa azuma ni ha wa nishi ni (Tsuki wa Higashi ni Hi wa Nishi ni ～Operation Sanctuary～)

[AKKAN-Bi PROJECT (Yanagi Hirohiko)] OPERATION -V- (Gundam Build Divers) [Digital]

Boko Boko Sakusen desu! - BOKO BOKO OPERATION

(COMIC1☆9) [Detox-Girls (Akai Hoya)] ALDNOAH.ERO (Aldnoah.Zero, Vividred Operation)

BOKO BOKO OPERATION

[Horn/Wood] Ansel no Operator Care (Arknights)

Back Cube Operation