I want to be! PURE -Fuyukawa family siblings story
[Sawada Daisuke] Hitoduma Tantei no Chinkenpo | Married Investigator's Chinkenpo (COMIC Shingeki 2011-01) [English] [SaHa]
Nyotaika Sousa sarechimatta | Gender Bender Investigation
[Oomori Harusame] Kyoudai Ijou Koibito Miman | More than Siblings, Less than Lovers (COMIC HOTMILK 2010-06) [English]
[Sakaki Naomoto] Tokumei Chikan Otori Sousahan | Special Molester Decoy Investigation Squad Ch. 1-2 [English] {Doujins.com}
Danchi Kyoudai no Gogo | The Apartment Siblings’ Afternoon
Kisei Mushi to Shitei | Parasite and Sibling
[Tokisana] Undercover Investigator Suzu (English)
Mahou Tokusou Greedia3 - Magical Investigator Greedia3
(SC2016 Winter) [cocon! (Otone)] Evenkuruga Siblings | Evenkuruga no Shitei (Utawarerumono Itsuwari no Kamen) [English] [EHCOVE] [Decensored]
[Isako Rokuroh] Kyoudaizakari | Sibling Lust (Bishoujo Kakumei KIWAME 2009-04 Vol. 1) [English] [darknight] [Decensored]
Siblings In The Train
Closed investigation journal
Kyoudai de Enmusubi | We're Siblings but Let's Get Married
Atlantis Investigation
[Kuruma Ebi] Chousa File H - Investigation File
[Yoru no Oto] Woman Investigator K - Mayaku Sousa Hen | Woman Investigator K - Narcotics Investigation (Slave Heroines Vol. 9) [English] {doujin-moe.us}
Saimin Shihai ~Rias no H na Torishirabe~ | Hypnosis Control ~Rias's Ecchi Investigation~
[Saimin! Pikatto House (Tetsuya, Routa)] Saimin Shihai [Sumi] ~Rias no H na Torishirabe~ | Hypnosis Control ~Rias's Ecchi Investigation~ (Highschool DxD)
TS Detective Niizuma Hiromi Investigate the missing college student case!
[Matsuyama Hayate, Hitotsuki Katagiri] Sexy Undercover Investigation! Don't spread it too much! Lewd TS Physical Examination
Crime Scene Investigation - Takeshi Matsu (Bara)
[Mimi Mimizu] Kyoudai Kenka wa Inu mo Kuwanai | Sibling's Argument is a Dog's Breakfast (COMIC RIN 2010-11) [English]
[Sakaki Naomoto] Tokumei Chikan Otori Sousahan | Special Molester Decoy Investigation Squad Ch. 1-6 [English] {Doujins.com}
[Shimaji] Ona-Kyoudai | Masturbation Siblings (Otokonoko Heaven Vol. 09) [English] [mysterymeat3]
[ratatatat74] Closed investigation journal (League of Legends) [English]
[Hiratsura Masaru] Sennyuu Sousakan Erika | Sneaking Investigator Erika (COMIC SIGMA 2008-03 Vol. 17) [English] [SaHa]
Water Type Inter-Species Girl's Tentacle Investigation
Shuukyoujou no Riyuu de Onanii Dekinai Kyoudai | Siblings Who Can't Masturbate For Religious Reasons
Evenkuruga Siblings | Evenkuruga no Shitei
[Sakaki Naomoto] Tokumei Chikan Otori Sousahan | Special Molester Decoy Investigation Squad Ch. 1-3 [English] {Doujins.com}
Pervert Siblings and Their Dog
(SUPER22) [Arcon (Meiya)] Kyo-dai After | Siblings After (NARUTO) [English] {doujin-moe.us}
The Kamoshida Investigation
[Sakaki Naomoto] Tokumei Chikan Otori Sousahan | Special Molester Decoy Investigation Squad [English] {Doujins.com}
Two Siblings' Fela Pure - Chapter 5
[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)
[Sakaki Naomoto] Tokumei Chikan Otori Sousahan Ch.1 | Special Molester Decoy Investigation Squad Ch.1 [English] {Doujins.com}
Mahou Tokusou Greedia4 - Magical Investigator Greedia Final
Shite Ii Kyoudai | Incestous Siblings
Nakayoshi Kyo-dai | Close Siblings
Naruto - School Siblings
[Supralpaca] Sibling Play [English]
[Namanama Shandy Gaff (nf4)] Atlantis Investigation (Amelia Watson, Gawr Gura) [Digital] [English]
CLUB DE INVESTIGACIÓN CIENTÍFICA
Shippai! Otori Sousa | Failure! Investigation Bait
Taima Sousakan Ayano (Demon Investigator Ayano) [ENG]
(C66) [Ukkaridou (Inari Satsuki, Shimazu Isami)] Nagisa no "..." | Sibling Showdown (Pretty Cure) [English] [sirC]