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Summary

One day, the little brother is possessed by a sex demon. Our hero, Shinonome Kei, is possessed by a sex demon named Ink. A depraved kind of illness befalls him! If he is to be saved, he must have sex until he ejaculates. Ink's target is Kei's elder sister, Otoka. She coerces Otoka to seduce and have sex with her little brother in order to save his life. [From DLsite English]

Futa Ane ~Bitter & Sweet~
Futa Ane ~Bitter & Sweet~
NAN%
Tags
  • Incest Romance
  • Twin Sisters as Heroines
  • Shimaidon with Twins Ending
  • Divorcee Heroine
  • Blood-related Brother/Sister Incest
Rating 7.4823 Users
No Pantsu!!
No Pantsu!!
NAN%
Tags
  • Protagonist's Sister as a Support Character
  • Spontaneous Sex Scenes
  • Student Council
  • Comedic Love Triangle
  • Childishly Violent Heroine
Rating 6.7730 Users
D-EVE in you
D-EVE in you
NAN%
Tags
  • Japanese Idols
  • Idol Heroine
  • Singer Heroine
  • Heroine with Intake Hairstyle
  • Exhibitionism
Rating 7.0925 Users
Sensei o Haramaseyou! ~Hiyoko no Noroi de Toumeika Suru Ore!?~
Sensei o Haramaseyou! ~Hiyoko no Noroi de Toumeika Suru Ore!?~
NAN%
Tags
  • P.E. Teacher Heroine
  • Principal Heroine
  • Heroine with Spats
  • School Nurse Heroine
  • Heroine with Tights
Rating 6.4557 Users
Hime Dorei ~Mesu e to Ochiyuku Futago no Oujo~
Hime Dorei ~Mesu e to Ochiyuku Futago no Oujo~
NAN%
Tags
  • Princess Heroine
  • Play Piercing
  • Autobukkake
  • Sexual Harassment
  • Past
Rating 7.3134 Users
Knight Carnival!
Knight Carnival!
NAN%
Tags
  • British Mythology
  • Heroine Based on a Fictional Person
  • Knight Heroine
  • Heroine with Armor
  • Deity Protagonist
Rating 6.6521 Users
Ane to Imouto o Iinari ni Suru 10 no Kairitsu ~Hou mo Shimai mo Okashitsukuse!~
Ane to Imouto o Iinari ni Suru 10 no Kairitsu ~Hou mo Shimai mo Okashitsukuse!~
NAN%
Tags
  • Triple Footjob
  • Discipline Committee Member Heroine
  • Protagonist's Twin as a Heroine
  • Comedy Rape
  • Foolish Protagonist
Rating 5.9225 Users
Gachi Otome Quintet
Gachi Otome Quintet
NAN%
Tags
  • Cupid Heroine
  • Fictional Island Near Futuristic Japan
  • European Heroine
  • Island
  • Yamato Nadeshiko Heroine
Rating 7.4627 Users
Himegoto-Ai ~Hameru Oyako no Kimochi Yosa~
Himegoto-Ai ~Hameru Oyako no Kimochi Yosa~
NAN%
Tags
  • Mother/Son Romance
  • Protagonist's Older Sister as a Heroine
  • Brother/Sister Romance
  • Palace
  • Royal Protagonist
Rating 6.3736 Users
Haramasete Seiryuu-kun! ~Jinginaki Onna no Tatakai~
Haramasete Seiryuu-kun! ~Jinginaki Onna no Tatakai~
NAN%
Tags
  • Duel
  • Comedic Love Triangle
  • Popular Protagonist
  • Heroine with Tattoo
  • No "Keep Voice on Click" Option
Rating 6.2523 Users
Koi mo H mo Obenkyou mo, Omakase! Oneechan-bu
Koi mo H mo Obenkyou mo, Omakase! Oneechan-bu
NAN%
Tags
  • Ejaculation Forewarner
  • Harem Ending with Theme
  • Brother/Sister Romance
  • Blood-related Brother/Sister Incest
  • Sadist Heroine
Rating 6.8137 Users
Binyuu Kiss Nee Rimi "Otouto no Kuse ni Sakarau Nante... Namaiki yo!"
Binyuu Kiss Nee Rimi "Otouto no Kuse ni Sakarau Nante... Namaiki yo!"
NAN%
Tags
  • Oneesan-type Heroine
  • Blood-related Aunt/Nephew Incest
  • Incest Romance
  • Kissing Scene
  • Armpit Sex
Rating 7.3122 Users
Sailor Fuku Shinryou Tsumaka ~Naisho no Ecchi na Counseling~
Sailor Fuku Shinryou Tsumaka ~Naisho no Ecchi na Counseling~
NAN%
Tags
  • Widow Heroine
  • Protagonist's Blood-related Mother as a Heroine
  • Mother/Son Romance
  • Blood-related Mother/Son Incest
  • Netori
Rating 6.8960 Users
Majo-gari no Kishi ~Jinkaku Ten
Majo-gari no Kishi ~Jinkaku Ten'i no Ori~
NAN%
Tags
  • Medieval Fantasy
  • Brother/Sister Incest
  • Body Swapping
  • Gaping
  • Incest
Rating 5.9823 Users
Asanagi no Aquanauts
Asanagi no Aquanauts
NAN%
Tags
  • Single Character Multiple Defloration
  • Protagonist's Twin as a Heroine
  • Mermaid Heroine
  • Emotionless Heroine
  • Incest Romance
Rating 6.8427 Users
Hitozuma Dorei Keikaku
Hitozuma Dorei Keikaku
NAN%
Tags
  • Urination Fetish
  • Dramatic Love Triangle
  • Revenge
  • Heroine with Garter Belt
  • Protagonist's Sister as a Support Character
Rating 6.8924 Users
Ane☆Hara-mix 2
Ane☆Hara-mix 2
NAN%
Tags
  • Shinigami Heroine
  • Succubus Heroine
  • Inbreeding
  • Non-blood-related Brother/Sister Incest
  • Impregnation
Rating 6.7424 Users
Tsuma Youji ~Boku wa Hitozuma Kanrinin~
Tsuma Youji ~Boku wa Hitozuma Kanrinin~
NAN%
Tags
  • Janitor Protagonist
  • Apartment Building
  • Fortune-teller Heroine
  • Oyakodon Ending
  • Foreigner Heroine
Rating 6.8522 Users
Musuko no Inbou ni Chietsu Suru Haha ~ Mama o Gifu ni Watasanai!
Musuko no Inbou ni Chietsu Suru Haha ~ Mama o Gifu ni Watasanai!
NAN%
Tags
  • Protagonist's Blood-related Mother as a Heroine
  • Blood-related Mother/Son Incest
  • Netori
  • Only Blood-related Heroines
  • Only Older Heroines
Rating 5.9526 Users
Kresnik ~Saiin ni Modaeru Kyuuketsuki Hunter~
Kresnik ~Saiin ni Modaeru Kyuuketsuki Hunter~
NAN%
Tags
  • Vampire Hunter Heroine
  • No "Keep Voice on Click" Option
  • Heroine with Shorts
  • Superpowers
  • Oneesan-type Heroine
Rating 6.8435 Users
Aibo Nyuujoku ~Moushuu no Kyonyuu-zeme Zanmai~
Aibo Nyuujoku ~Moushuu no Kyonyuu-zeme Zanmai~
NAN%
Tags
  • Unavoidable Netorare
  • Pornography
  • Sex Under the Necessity
  • Protagonist's Blood-related Mother as a Heroine
  • Blood-related Mother/Son Incest
Rating 6.2137 Users
Harahara Shichau!! ~Oya ni wa Naisho no Kozukuri Seikatsu~ -Amahara Izumo Hen-
Harahara Shichau!! ~Oya ni wa Naisho no Kozukuri Seikatsu~ -Amahara Izumo Hen-
NAN%
Tags
  • Reverse Rape
  • Rape with Blackmail
  • Blood-related Brother/Sister Incest
  • Only Blood-related Heroines
  • Siscon Protagonist
Rating 6.2662 Users
R.U.R.U.R ~Kono Ko no Tame ni, Semete Kirei na Hoshizora o~
R.U.R.U.R ~Kono Ko no Tame ni, Semete Kirei na Hoshizora o~
NAN%
Tags
  • Hard Science Fiction
  • Future Setting in a Fictional World
  • Artificial Intelligence
  • Nanomachines
  • Spaceship
Rating 7.2923 Users
Imojoku
Imojoku
NAN%
Tags
  • Protagonist's Younger Sister as a Heroine
  • Only Blood-related Heroines
  • No "Keep Voice on Click" Option
  • Classic Tsundere Heroine
  • Only Protagonist's Sisters as Heroine(s)
Rating 6.1126 Users
Ane ga Boku no Seieki Tsuki Pantsu o Haku Wake
Ane ga Boku no Seieki Tsuki Pantsu o Haku Wake
39%
Tags
  • Only Protagonist's Sisters as Heroine(s)
  • Clumsy Heroine
  • Perverted Protagonist
  • Siscon Protagonist
  • Cosplay
Rating 6.6722 Users
Ane to Ore wa Naka ga Ii
Ane to Ore wa Naka ga Ii
36%
Tags
  • Brocon Heroine
  • Blood-related Brother/Sister Incest
  • Hairjob
  • Oneesan-type Heroine
  • Harem Ending
Rating 6.3033 Users
Majo-gari no Kishi ~Jinkaku Ten
Majo-gari no Kishi ~Jinkaku Ten'i no Ori~
35%
Tags
  • Medieval Fantasy
  • Brother/Sister Incest
  • Body Swapping
  • Gaping
  • Incest
Rating 5.9823 Users
Sailor Fuku Shinryou Tsumaka ~Naisho no Ecchi na Counseling~
Sailor Fuku Shinryou Tsumaka ~Naisho no Ecchi na Counseling~
33%
Tags
  • Widow Heroine
  • Protagonist's Blood-related Mother as a Heroine
  • Mother/Son Romance
  • Blood-related Mother/Son Incest
  • Netori
Rating 6.8960 Users
Binyuu Kiss Nee Rimi "Otouto no Kuse ni Sakarau Nante... Namaiki yo!"
Binyuu Kiss Nee Rimi "Otouto no Kuse ni Sakarau Nante... Namaiki yo!"
33%
Tags
  • Oneesan-type Heroine
  • Blood-related Aunt/Nephew Incest
  • Incest Romance
  • Kissing Scene
  • Armpit Sex
Rating 7.3122 Users
Haramasete Seiryuu-kun! ~Jinginaki Onna no Tatakai~
Haramasete Seiryuu-kun! ~Jinginaki Onna no Tatakai~
32%
Tags
  • Duel
  • Comedic Love Triangle
  • Popular Protagonist
  • Heroine with Tattoo
  • No "Keep Voice on Click" Option
Rating 6.2523 Users
Koi mo H mo Obenkyou mo, Omakase! Oneechan-bu
Koi mo H mo Obenkyou mo, Omakase! Oneechan-bu
32%
Tags
  • Ejaculation Forewarner
  • Harem Ending with Theme
  • Brother/Sister Romance
  • Blood-related Brother/Sister Incest
  • Sadist Heroine
Rating 6.8137 Users
Gachi Otome Quintet
Gachi Otome Quintet
32%
Tags
  • Cupid Heroine
  • Fictional Island Near Futuristic Japan
  • European Heroine
  • Island
  • Yamato Nadeshiko Heroine
Rating 7.4627 Users
Himegoto-Ai ~Hameru Oyako no Kimochi Yosa~
Himegoto-Ai ~Hameru Oyako no Kimochi Yosa~
31%
Tags
  • Mother/Son Romance
  • Protagonist's Older Sister as a Heroine
  • Brother/Sister Romance
  • Palace
  • Royal Protagonist
Rating 6.3736 Users
Hitozuma Dorei Keikaku
Hitozuma Dorei Keikaku
31%
Tags
  • Urination Fetish
  • Dramatic Love Triangle
  • Revenge
  • Heroine with Garter Belt
  • Protagonist's Sister as a Support Character
Rating 6.8924 Users
Tsuma Youji ~Boku wa Hitozuma Kanrinin~
Tsuma Youji ~Boku wa Hitozuma Kanrinin~
31%
Tags
  • Janitor Protagonist
  • Apartment Building
  • Fortune-teller Heroine
  • Oyakodon Ending
  • Foreigner Heroine
Rating 6.8522 Users
Kresnik ~Saiin ni Modaeru Kyuuketsuki Hunter~
Kresnik ~Saiin ni Modaeru Kyuuketsuki Hunter~
30%
Tags
  • Vampire Hunter Heroine
  • No "Keep Voice on Click" Option
  • Heroine with Shorts
  • Superpowers
  • Oneesan-type Heroine
Rating 6.8435 Users
Harahara Shichau!! ~Oya ni wa Naisho no Kozukuri Seikatsu~ -Amahara Izumo Hen-
Harahara Shichau!! ~Oya ni wa Naisho no Kozukuri Seikatsu~ -Amahara Izumo Hen-
30%
Tags
  • Reverse Rape
  • Rape with Blackmail
  • Blood-related Brother/Sister Incest
  • Only Blood-related Heroines
  • Siscon Protagonist
Rating 6.2662 Users
Imojoku
Imojoku
29%
Tags
  • Protagonist's Younger Sister as a Heroine
  • Only Blood-related Heroines
  • No "Keep Voice on Click" Option
  • Classic Tsundere Heroine
  • Only Protagonist's Sisters as Heroine(s)
Rating 6.1126 Users
Sister x Sister ~Lovevery Sisters~
Sister x Sister ~Lovevery Sisters~
29%
Tags
  • Comedic Love Triangle
  • Shimaidon Ending
  • Sex in a School Infirmary
  • Heroine with Multiple Personalities
  • Pretending Heroine
Rating 7.1040 Users
Hapitora -Happy Transportation-
Hapitora -Happy Transportation-
29%
Tags
  • Clumsy Heroine
  • Co-worker Heroine
  • Fictional Island Near Futuristic Japan
  • Homemaker Protagonist
  • Donkan Protagonist
Rating 7.0125 Users
Dungeon Crusaderz ~Tales of Demon Eater~
Dungeon Crusaderz ~Tales of Demon Eater~
29%
Tags
  • Dungeon Crawling Game
  • Action
  • RPG
  • Twin Footjob
  • Past
Rating 6.6128 Users
Mazo x Love
Mazo x Love
29%
Tags
  • Comic Convention
  • Comedy Rape
  • Mangaka Protagonist
  • Police Officer Heroine
  • Heroine with Inverted Nipples
Rating 7.5423 Users
Otakano -Konna ni Kawaii Kanojo ga Otaku na Wake ga Nai-
Otakano -Konna ni Kawaii Kanojo ga Otaku na Wake ga Nai-
28%
Tags
  • Poker
  • Title Parody
  • Classic Tsundere Heroine
  • Harem Ending with Theme
  • Onna Bugeisha Heroine
Rating 6.7926 Users
Trouble Home! ~Giri no Haha to Imouto wa Koigataki~
Trouble Home! ~Giri no Haha to Imouto wa Koigataki~
28%
Tags
  • Oyakodon Ending
  • Heroine with Ahoge
  • Non-blood-related Mother/Son Incest
  • Protagonist's Non-blood-related Mother as a Heroine
  • Non-blood-related Incest
Rating 6.9136 Users
Nami no Mani Mani ~Sazanami Shinryoujo~
Nami no Mani Mani ~Sazanami Shinryoujo~
28%
Tags
  • Barmaid Heroine
  • Medical Doctor Protagonist
  • Island
  • Hetare Protagonist
  • Sickly Heroine
Rating 7.4928 Users
Inraku no Ketsuzoku ~Kindan no Jubaku~
Inraku no Ketsuzoku ~Kindan no Jubaku~
27%
Tags
  • Inbred Protagonist
  • Inbred Heroine
  • Only Protagonist's Relatives as Heroine(s)
  • Harem Ending with Theme
  • Heroine with Grandchildren
Rating 6.9675 Users
Maou to Seijo ~Norowareshi Injoku no Rinne~
Maou to Seijo ~Norowareshi Injoku no Rinne~
27%
Tags
  • Maou Protagonist
  • Christian Mythology
  • Blowbang
  • Internal Exhibition of Sex
  • No "Keep Voice on Click" Option
Rating 6.4621 Users
Kamen no Goumonshi
Kamen no Goumonshi
27%
Tags
  • Heroine with Armor
  • Fighting Princess Heroine
  • Orcs
  • Sexual Slavery
  • Heroine with Leotard
Rating 6.0223 Users

Oharai Onee-san! ~Otouto o Yuuwaku Shinasai~ has not appeared in our Steam sample enough to calculate it's similar novels... sorry!
A novel needs atleast 20 owners before it's similarity is calculated.

Tags (42 total)

NameScoreImportanceWeight
Occult Club2.002.785.55
Spontaneous Power-ups2.002.695.38
Homosexual Support Character2.002.324.65
Blood-related Brother/Sister Incest3.001.494.46
Heroine with Wings2.002.214.41
Heroine with a Fang2.002.064.12
Small Breast Sizes Heroine (Non-Loli)2.002.034.07
Pretending Heroine2.001.983.95
Sex Under the Necessity2.001.983.95
Succubus Heroine2.001.973.93
Demons2.001.903.79
Demon Heroine2.001.883.76
Airhead Heroine2.001.783.57
Miko Heroine2.001.713.42
Sex with Protagonist Only2.001.132.26
Only Virgin Heroines2.001.082.17
High Sexual Content2.001.052.10
Student Heroine2.000.991.98
Big Breast Sizes Heroine1.501.311.96
Twin Blowjob1.501.291.93
Group Sex of One Male and Several Females2.000.921.83
Mutual Masturbation1.001.761.76
Heroine with Big Breasts2.000.851.71
Cowgirl2.000.841.68
Blowjob1.501.111.67
Nukige2.500.651.63
Doggy Style2.000.801.61
Piledriver1.001.591.59
Defloration2.000.761.52
Masturbation1.001.491.49
Anilingus1.001.471.47
Multiple Penetration1.001.271.27
Bathroom Sex1.001.191.19
Quickie Fix Position1.001.111.11
Sex in Public Places1.001.091.09
Sitting Sex1.001.061.06
Outdoor Sex1.001.001.00
Boobjob0.751.320.99
Male Protagonist3.000.300.91
Fingering0.331.520.50
Handjob0.331.500.50
ADV2.000.150.29

Traits (68 total)

NameCharactersImportanceWeight
Detached Kimono Sleeves Clothes13.062.12
Uwabaki Clothes12.871.99
Possession Subject of12.481.72
Incest Engages in (Sexual)21.471.61
Twin Blowjob Engages in (Sexual)21.451.59
Balls Sucking Engages in (Sexual)12.261.57
Wings Body12.221.54
Masturbation Engages in (Sexual)21.391.53
Lesbian Sex Engages in (Sexual)21.381.51
Shimapan Clothes12.131.48
Miko Role12.081.44
Corset Clothes12.061.43
Anal Fingering Engages in (Sexual)12.051.42
Anilingus Engages in (Sexual)12.011.39
Ankle Socks Clothes12.011.39
Demon Role12.001.39
Small Breast Sizes Body11.991.38
Sex in Public Places Engages in (Sexual)21.261.38
Full Brother Role11.951.35
Miko's Dress Clothes11.941.35
Piledriver Subject of (Sexual)11.941.35
Mutual Masturbation Engages in (Sexual)11.941.34
Younger Brother Role11.901.32
Fang Body11.881.30
Group Sex of One Male and Several Females Engages in (Sexual)21.171.29
Short (obsolete) Body11.861.29
Multiple Penetration Subject of (Sexual)11.861.29
Outdoor Sex Engages in (Sexual)21.161.27
Bob Cut Hair11.821.26
String Ribbon Tie Clothes11.821.26
Detached Sleeves Clothes11.821.26
Deepthroat Engages in (Sexual)11.801.25
Teal Eyes11.731.20
Nipple Sucking Engages in (Sexual)11.701.18
Boots Clothes11.681.16
Violet Eyes21.041.15
Pointed Ears Body11.641.14
Full Sister Role11.571.09
Older Sister Role11.561.08
Sidehair Hair20.981.07
Group Sex Engages in (Sexual)11.501.04
Choker Clothes11.501.04
Student Role11.491.03
Headband Clothes11.451.00
Blunt Bangs Hair11.400.97
Bathroom Sex Engages in (Sexual)11.390.96
Nipple Sucking Subject of (Sexual)11.380.96
Knee-high Socks Clothes11.380.96
Kid Body11.370.95
Virgin Sex Engages in (Sexual)20.850.93
Pink Hair11.330.92
Belt Clothes11.270.88
Blowjob Engages in (Sexual)20.760.84
Violet Hair11.190.83
Butterfly Subject of (Sexual)11.170.81
Handjob Engages in (Sexual)11.160.80
Big Breasts Body11.140.79
Quickie Fix Subject of (Sexual)11.080.75
Vaginal Fingering Subject of (Sexual)11.080.75
Boobjob Engages in (Sexual)11.070.74
Parted to Side Hair11.050.73
Thigh-high Stockings Clothes11.040.72
Cowgirl Subject of (Sexual)10.950.66
Doggy Style Subject of (Sexual)10.930.64
Black Hair10.810.56
Long Hair10.750.52
School Uniform Clothes10.750.52
Teen Body10.620.43