Tokumu Mayaku Sousakan Linda | Special Narcotics Investigator Linda
[Hiratsura Masaru] Sennyuu Sousakan Erika | Sneaking Investigator Erika (COMIC SIGMA 2008-03 Vol. 17) [English] [SaHa]
Aki Sora Ch3 - Siblings Crossed The Forbidden Line
Uwasa Saguri Zenpen | Rumor Investigation - Part One
Siblings In The Train
[Tokisana] Undercover Investigator Suzu (English)
[Mutsuki] Kyoudai no Kyoukaisen | The Siblings' Ley Line (Kono Mama Naka de...) [English] {Hennojin} [Digital]
[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]
Kyonyuu Sousa-kan Yura - Bitch Order | Yura Big Boobs Investigator - Bitch Order Ch. 1
Two Siblings' Fela Pure - Chapter 3
[Hindenburg] Nakayoshi Kyoudai - Siblings That Get Along [Kinjirareta Asobi Chapter 8][English]
Kyoudai no Kyoukaisen | The Siblings' Ley Line
Sexy Undercover Investigation! Don't spread it too much! Lewd TS Physical Examination Part 2
Evenkuruga Siblings | Evenkuruga no Shitei
[Zaki Zaraki] Aru Kyoudai no Baai | In The Case of Certain Siblings (Hamezukids) [English] {Mistvern}
[NO.Gomes] Gravity Die - TS School Infiltrating Investigator: The Shameful Stripshow (TS Gakuen Sennyuu Sousakan: Chijoku No Stripshow) (English)
Sibling Rivalry [English] [Rewrite] [olddog51]
Stubborn Siblings
You Will! -Fuyukawaka siblings story-
Federal Anti-Groping Investigator Captured - The Trapped Officer
Nandemo Chousa Mama Shizue | The All-Around Investigator Momma, Shizue
Detective Chun-Li Boobie Investigation
Siblings Stranded [English] [Rewrite] [EZ Rewriter]
[CRAFT (Kiliu)] Nandemo Chousa Mama Shizue-san | The All-Around Investigator Momma Shizue-san [English] [The Chrysanthemum Translations] [Digital]
Closed investigation journal
Tokumei Chikan Otori Sousahan | Special Molester Decoy Investigation Squad Ch. 1-3
Busty Married Wife Infiltrates Investigator·Aya
Kyoudai de Enmusubi | We're Siblings but Let's Get Married
[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)
[Jamming] Kyonyuu Sousa-kan Yura - Bitch Order | Yura Big Boobs Investigator - Bitch Order Ch. 1 [English] [Raknnkarscans]
Busty Married Woman Investigator Yuka
Undercover Drug Investigator Monica & Jita
Secret Sibling Sex [English] [Rewrite] [EZ Rewriter]
siblings
Sick SIblings
[ReDrop] Undercover Investigator Atsuko Saejima [English] =LWB=
Tokumei Chikan Otori Sousahan Ch.1 | Special Molester Decoy Investigation Squad Ch.1
Two Siblings' Fela Pure - Chapter 4
[Hindenburg] Kyoudai Ai | Sibling love [English] [SaHa]
Shippai! Otori Sousa | Failure! Investigation Bait
[Isako Rokuroh] Kyoudaizakari | Sibling Lust (Bishoujo Kakumei KIWAME 2009-04 Vol. 1) [English] [darknight] [Decensored]
[Tsubaki Jushirou] Danchi Kyoudai no Gogo | The Apartment Siblings’ Afternoon [English] {Hennojin}
Sexy Undercover Investigation! Don't spread it too much! Lewd TS Physical Examination Part 1
[Supralpaca] Sibling Play [English]
Nitamono Shitei | Similar Siblings
[Misaoka] Kyoudai Nakayoku | Intimate Step-siblings (NyuNyu Wave) [English] [InsanePraetor]
Nakayoshi Kyo-dai | Close Siblings
Bijin Kensatsukan Hamerare Chijoku Sousa | Beautiful Prosecutor's Framing and Rape Investigation
Shite Ii Kyoudai Incestous Siblings
[Sakaki Naomoto] Tokumei Chikan Otori Sousahan | Special Molester Decoy Investigation Squad [English] {Doujins.com}
Kyoudai Switch | Siblings Switch
Uwasa Saguri Kouhen | Rumor Investigation - Part Two
Nyotaika Sousa sarechimatta | Gender Bender Investigation
Gyaru Hakase no Himitsu Kenkyuu | Gyaru Professor’s Secret Investigation
[Zarigani Arms] Aloerosy (Muhyo and Roji's Bureau of Supernatural Investigation)
[Oogoshi Koutarou] Ryouki Keiji Marusai - detective investigating bizarre case;MARUSAI -
TS Detective Niizuma Hiromi Investigate the missing college student case!
Two Siblings' Fela Pure - Chapter 2
[Souko Souji] Hentai Kyoudai to Inu | Pervert Siblings and Their Dog (COMIC Tenma 2013-04) [English] [Hentai Bedta] [Decensored]
(SC2016 Winter) [cocon! (Otone)] Evenkuruga no Shitei | Evenkuruga Siblings (Utawarerumono Itsuwari no Kamen) [English] [EHCOVE]
Komi-ke no Kyoudai Asobi | The Komis’ Sibling Playtime
[Sawada Daisuke] Hitoduma Tantei no Chinkenpo | Married Investigator's Chinkenpo (COMIC Shingeki 2011-01) [English] [SaHa]
The Roasted Empire 2-the Investigation
Kyo-dai After | Siblings After
[Almarosso] Manbiki G-men to SEX suru | Having Sex with the Loss Prevention Investigator [English] [desudesu]
[Aoki Kanji] Kyoudai no Himitsu no Su | The Siblings' Secret Nest (COMIC Anthurium 2016-10) [English] [Team Koinaka] [Digital]
I want to be! PURE -Fuyukawa family siblings story
Sudden Shock! Female Investigator Asuka
[kupala] Jakume Torareru Chikan Sousakan -The Trapped Officer- | Federal Anti-Groping Investigator Captured - The Trapped Officer [English] {doujin-moe.us} [Digital]
Chichi Katajikena Sousakan | Shameless Breast Investigator
Aki Sora Ch5 - The Close Siblings
[Oomori Harusame] Kyoudai Ijou Koibito Miman | More than Siblings, Less than Lovers (COMIC HOTMILK 2010-06) [English]
Fellatio Kenkyuubu | Departamento de Investigación de las Felaciones Ch. 1
(SC2016 Winter) [cocon! (Otone)] Evenkuruga no Shitei | Evenkuruga Siblings (Utawarerumono Itsuwari no Kamen) [English] [EHCOVE] [Decensored]
Komi-ke no Kyoudai Asobi The Komis’ Sibling Playtime
Two Siblings' Fela Pure - Chapter 6
Sexy Undercover Investigation! Don't spread it too much! Lewd TS Physical Examination
Galaxy Investigation Agent Eira
[Shimanto Shisakugata] Kyoudai tte ii na | Siblings Sure Are Great (Comic LO 2014-01) [English] {5 a.m.}
Sudou Ie No Seijijou | Sudou Siblings Sexual Circumstances
Nympho Siblings [English] [Rewrite] [EZ Rewriter]
(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]
Decoy Investigator Kyouka: Cosplay Party Infiltration
No Longer Siblings
Hazukashii Chibusa Chapter 4: Sibling Union
Saimin Shihai ~Rias no H na Torishirabe~ | Hypnosis Control ~Rias's Ecchi Investigation~
[Nigami Whip Milk (Iegami)] Shite Ii Kyoudai | Incestous Siblings [English]
(Yonekura Kengo) Warau Kangofu First Limited Edition ~ Smile Nurse [English translation](Part3. Stupid Siblings)
Crime Scene Investigation - Takeshi Matsu (Bara)
[Chuuka Naruto] Onna Sousakan Choukyou Rensa | Woman Investigator Training Link [English] [SaHa]
[Jamming] Kyonyuu Sousa-kan Yura - Bitch Order | Yura Big Boobs Investigator - Bitch Order [English] [Raknnkarscans]
[Mimi Mimizu] Kyoudai Kenka wa Inu mo Kuwanai | Sibling's Argument is a Dog's Breakfast (COMIC RIN 2010-11) [English]
[Yoru no Oto] Woman Investigator K - Mayaku Sousa Hen | Woman Investigator K - Narcotics Investigation (Slave Heroines Vol. 9) [English] {doujin-moe.us}
Sibling Lust
More than Siblings, Less than Lovers
Intimate Step-siblings
[Sakaki Naomoto] Tokumei Chikan Otori Sousahan | Special Molester Decoy Investigation Squad Ch. 1-3 [English] {Doujins.com}
Crime Scene Investigation - Takeshi Matzu
Pervert Siblings and Their Dog
Danchi Kyoudai no Gogo | The Apartment Siblings’ Afternoon
[Nakami Yoshikage] Taima Sousakan Sanae ~Shokushu Ingyaku~ | Demon Investigator Sanae (Rider Suit Heroine Anthology Comics 2) [English] [SaHa]
Sibling Play
Kyoudai no Himitsu no Su | The Siblings' Secret Nest
Nitamono Kyoudai | Siblings are very much alike