Atlantis Investigation
[eltole] Busty Married Woman Investigator Yuka (ANGEL Club 2018-03) [Chinese]
[Supralpaca] Sibling Play [English]
[Mikami Hokuto] JUNK Kyoudai | Junk Siblings [English] [desudesu]
Tokumei Chikan Otori Sousahan Ch.1 | Special Molester Decoy Investigation Squad Ch.1
Sakuranbo Keimai | Cherry Siblings
Nyotaika Sousa sarechimatta | Gender Bender Investigation
Sick SIblings
[Sakaki Naomoto] Tokumei Chikan Otori Sousahan | Special Molester Decoy Investigation Squad Ch. 1-2 [English] {Doujins.com}
Chichi Katajikena Sousakan | Shameless Breast Investigator
[Shimanto Shisakugata] Kyoudai tte ii na | Siblings Sure Are Great (Comic LO 2014-01) [English] {5 a.m.}
(SC2016 Winter) [cocon! (Otone)] Evenkuruga Siblings | Evenkuruga no Shitei (Utawarerumono Itsuwari no Kamen) [English] [EHCOVE] [Decensored]
Gamer Kyoudai ga Sex wo Oboeta You desu | It Seems that the Gamer Siblings Picked up Sex
Ganyu-chan's investigation gone horn
[Jamming] Kyonyuu Sousa-kan Yura - Bitch Order | Yura Big Boobs Investigator - Bitch Order Ch. 1 [English] [Raknnkarscans]
Water Type Inter-Species Girl's Tentacle Investigation
Busty Married Woman Investigator Yuka
[kupala] Jakume Torareru Chikan Sousakan -The Trapped Officer- | Federal Anti-Groping Investigator Captured - The Trapped Officer [English] {doujin-moe.us} [Digital]
Two Siblings' Fela Pure - Chapter 6
summer siblings [English] [Rewrite] [gOZER45]
Nenchaku Taishitsu - Chap 01 - Adulterous Step-Siblings - Sex Friend
[rondonko] Nitamono Kyoudai | Siblings are very much alike (COMIC LO 2021-07) [English] [Digital]
[Fue] Futari wa Fera Pure Okawari | Two Siblings Fela Pure, Another Serving (COMIC MILF 2011-08 Vol. 2) [English] [Kusanyagi]
(SC2016 Winter) [cocon! (Otone)] Evenkuruga no Shitei | Evenkuruga Siblings (Utawarerumono Itsuwari no Kamen) [English] [EHCOVE]
Love Kachuu Chapter 12 "Sibling Summer Vacation"
Aki Sora Ch5 - The Close Siblings
Sibling Sex [English] [Rewrite] [olddog51]
Sibling Play
Naruto - School Siblings
Hypnosis Control ~Rias's Ecchi Investigation~
Sexy Undercover Investigation! Don't spread it too much! Lewd TS Physical Examination Part 1
[Mimi Mimizu] Kyoudai Kenka wa Inu mo Kuwanai | Sibling's Argument is a Dog's Breakfast (COMIC RIN 2010-11) [English]
Saimin Shihai ~Rias no H na Torishirabe~ | Hypnosis Control ~Rias's Ecchi Investigation~
Danchi Kyoudai no Gogo | The Apartment Siblings’ Afternoon
[Sabawo] Monochrome Siblings [English] [Boutok]
Closed investigation journal
Taima Sousakan Ayano (Demon Investigator Ayano) [ENG]
Aki Sora Ch3 - Siblings Crossed The Forbidden Line
Uwasa Saguri Kouhen | Rumor Investigation - Part Two
Stubborn Siblings
[Matsuyama Hayate, Hitotsuki Katagiri] Sexy Undercover Investigation! Don't spread it too much! Lewd TS Physical Examination
Closed investigation journal
[Tensei-kun] Kyodai - Ane to!! | Siblings - With Sister!!(COMIC Masyo 2012-01)[English][Amoskandy][Digital]
Galaxy Investigation Agent Eira
[ratatatat74] Closed investigation journal (League of Legends) [English]
[NO.Gomes] Gravity Die - TS School Infiltrating Investigator: The Shameful Stripshow (TS Gakuen Sennyuu Sousakan: Chijoku No Stripshow) (English)
[Ankoman] Muzan Sousakan ~Ryouka & Akari~ | Misery Investigators ~ Ryouka & Akari ~ (Seigi no Heroine Kangoku File Vol. 10) [English] [stnkmnsd] [Digital]
Busty Married Wife Infiltrates Investigator·Aya
Komi-ke no Kyoudai Asobi | The Komis’ Sibling Playtime
[Tsubaki Jushirou] Danchi Kyoudai no Gogo | The Apartment Siblings’ Afternoon [English] {Hennojin}
Nandemo Chousa Mama Shizue | The All-Around Investigator Momma, Shizue
Undercover Drug Investigator Monica & Jita
Fellatio Kenkyuubu | Departamento de Investigación de las Felaciones Ch. 1
[ReDrop] Undercover Investigator Atsuko Saejima [English] =LWB=
[Kuruma Ebi] Chousa File H - Investigation File
Kyonyuu Sousa-kan Yura - Bitch Order | Yura Big Boobs Investigator - Bitch Order Ch. 1
Tokumei Chikan Otori Sousahan | Special Molester Decoy Investigation Squad Ch. 1-2
[Saimin! Pikatto House (Tetsuya, Routa)] Saimin Shihai [Sumi] ~Rias no H na Torishirabe~ | Hypnosis Control ~Rias's Ecchi Investigation~ (Highschool DxD)
Goblin Prison Investigative Report
Two Siblings' Fela Pure - Chapter 2
[Namanama Shandy Gaff (nf4)] Atlantis Investigation (Amelia Watson, Gawr Gura) [Chinese] [白上フブキ.eth×真不可视汉化组] [Digital]
[Hindenburg] Nakayoshi Kyoudai - Siblings That Get Along [Kinjirareta Asobi Chapter 8][English]
(C75) [Shallot Coco (Yukiyanagi)] Yukiyanagi no Hon 18 Chun-Li Keiji no Oppai Sousa | Detective Chun-Li's Boobie Investigation (Street Fighter) [English] [Hentai from Hell]
[eltole] Busty Married Woman Investigator Yuka (ANGEL Club 2018-03)
[Aoki Kanji] Kyoudai no Himitsu no Su | The Siblings' Secret Nest (COMIC Anthurium 2016-10) [English] [Team Koinaka] [Digital]
Detective Chun-Li Boobie Investigation
Two Siblings' Fela Pure - Chapter 3
Secret Sibling Sex [English] [Rewrite] [EZ Rewriter]
[Oogoshi Koutarou] Ryouki Keiji Marusai - detective investigating bizarre case;MARUSAI -
Mahou Tokusou Greedia4 - Magical Investigator Greedia Final
Uwasa Saguri Zenpen | Rumor Investigation - Part One
No Longer Siblings
Komi-ke no Kyoudai Asobi The Komis’ Sibling Playtime
[Sakaki Naomoto] Tokumei Chikan Otori Sousahan | Special Molester Decoy Investigation Squad [English] {Doujins.com}
Gyaru Hakase no Himitsu Kenkyuu | Gyaru Professor’s Secret Investigation
More than Siblings - Less than Lovers
[Saimin! Pikatto House (Tetsuya, Routa)] Saimin Shihai [Sumi] ~Rias no H na Torishirabe~ | Hypnosis Control ~Rias's Ecchi Investigation~ (Highschool DxD) [English] (Trinity Translations Team)
Two Siblings' Fela Pure - Chapter 4
[Sawada Daisuke] Hitoduma Tantei no Chinkenpo | Married Investigator's Chinkenpo (COMIC Shingeki 2011-01) [English] [SaHa]
Shippai! Otori Sousa | Failure! Investigation Bait
The snail and the Siblings
[Sakaki Naomoto] Tokumei Chikan Otori Sousahan | Special Molester Decoy Investigation Squad Ch. 1-6 [English] {Doujins.com}
Two Siblings' Fela Pure - Chapter 5
Mina Ishihara, e Investigation Division (english)
[Jet Yowatari] Tokumu Mayaku Sousakan Linda | Special Narcotics Investigator Linda (Sennyuu Sousakan Anthology Comics) [English] {doujin-moe.us}
[Sakaki Naomoto] Tokumei Chikan Otori Sousahan Ch.1 | Special Molester Decoy Investigation Squad Ch.1 [English] {Doujins.com}
The Tadano Siblings Can't Control Their Urges
Nitamono Shitei | Similar Siblings
[QUDA] Undercover Drug Investigator Monica & Jita
Evenkuruga Siblings | Evenkuruga no Shitei
[Isako Rokuroh] Kyoudaizakari | Sibling Lust (Bishoujo Kakumei KIWAME 2009-04 Vol. 1) [English] [darknight]
(C89) [Mofu Shippo Lab (Subaru.)] Kyoudai de Tomodachi de Koibito na Boku to Neko | Siblings, Friends, Lovers: My life with a cat (Touhou Project) [English] [ATF]
[Hindenburg] Kyoudai Ai | Sibling love [English] [SaHa]
[Nakami Yoshikage] Taima Sousakan Sanae ~Shokushu Ingyaku~ | Demon Investigator Sanae (Rider Suit Heroine Anthology Comics 2) [English] [SaHa]
[Oomori Harusame] Kyoudai Ijou Koibito Miman | More than Siblings, Less than Lovers (COMIC HOTMILK 2010-06) [English]
Two Siblings' Fela Pure - Chapter 1
Kyoudai no Kyoukaisen | The Siblings' Ley Line {Hennojin}
(C66) [Ukkaridou (Inari Satsuki, Shimazu Isami)] Nagisa no "..." | Sibling Showdown (Pretty Cure) [English] [sirC]
Tokumei Chikan Otori Sousahan | Special Molester Decoy Investigation Squad Ch. 1-3
Busty Married Woman Investigator Yuka
Crime Scene Investigation - Takeshi Matsu (Bara)
Siblings In The Train
(Princess Festa) [Luciferhood (Uchoten)] Sakuranbo Keimai | Cherry Siblings (Fushigiboshi no Futagohime) [English] {Chin²}
[Zarigani Arms] Aloerosy (Muhyo and Roji's Bureau of Supernatural Investigation)
[Tokisana] Undercover Investigator Suzu (English)
Sick SIblings [English] [Rewrite] [EZ Rewriter]
(C86) [Imitation Moon (Narumi Yuu)] Gamer Kyoudai ga Sex wo Oboeta You desu | It Seems that the Gamer Siblings Picked up Sex (No Game No Life) [English] [The Chrysanthemum Translations]
[Kloah] Chichi Katajikena Sousakan | Shameless Breast Investigator (COMIC Anthurium 013 2014-05) [English] {Pluto}
[Nigami Whip Milk (Iegami)] Shite Ii Kyoudai | Incestous Siblings [English]
Federal Anti-Groping Investigator Captured - The Trapped Officer
[Chuuka Naruto] Onna Sousakan Choukyou Rensa | Woman Investigator Training Link [English] [SaHa]
Super de Hitozuma ni Innen Tsukete? | Investigating a Married Woman on Shoplifting Charges
[Namanama Shandy Gaff (nf4)] Atlantis Investigation (Amelia Watson, Gawr Gura) [Digital] [English]
Love Kachuu Chapter 8 "Sibling Feelings"
Atlantis Investigation
[Kleitos (Ryunosuke)] Fukushuu no Elf Lieselotte 2 ~Futanari Kaizou de Boshi Sennou Les Rape!~ | Vengeful Elf Liselotte 2 The Futanari Transformation and Sibling Lesbian Violation [English] {2d-market.com} [Decensored] [Digital]
Kyoudai no Kyoukaisen | The Siblings' Ley Line
Sexy Undercover Investigation! Don't spread it too much! Lewd TS Physical Examination Part 2
TS Detective Niizuma Hiromi Investigate the missing college student case!
Gyaru Hakase no Himitsu Kenkyuu | Gyaru Professor’s Secret Investigation
Nakayoshi Kyo-dai | Close Siblings
You Will! -Fuyukawaka siblings story-
siblings
Bijin Kensatsukan Hamerare Chijoku Sousa | Beautiful Prosecutor's Framing and Rape Investigation
(Yonekura Kengo) Warau Kangofu First Limited Edition ~ Smile Nurse [English translation](Part3. Stupid Siblings)
Sudou Ie No Seijijou | Sudou Siblings Sexual Circumstances
Hazukashii Chibusa Chapter 4: Sibling Union
[OHKOSHI Koutarou] - Detective Investigating Bizarre Case (Ryouki Keiji MARUSAI) - [ENGLISH]
CLUB DE INVESTIGACIÓN CIENTÍFICA
Sibling Rivalry [English] [Rewrite] [olddog51]
Bogo to Nick no Yarisugi Sousa | The investigation of Bogo and Nick
[Almarosso] Manbiki G-men to SEX suru | Having Sex with the Loss Prevention Investigator [English] [desudesu]
Shousa, Otori Sousa o Suru | Group Molester Decoy Investigation
I want to be! PURE -Fuyukawa family siblings story
[Hiratsura Masaru] Sennyuu Sousakan Erika | Sneaking Investigator Erika (COMIC SIGMA 2008-03 Vol. 17) [English] [SaHa]
(Gomi) The Tadano Siblings Can't Control Their Urges (Komi-san wa, Komyushou desu.)(Cleaned)
[Yoru no Oto] Woman Investigator K - Mayaku Sousa Hen | Woman Investigator K - Narcotics Investigation (Slave Heroines Vol. 9) [English] {doujin-moe.us}
Kyoudai de Enmusubi | We're Siblings but Let's Get Married