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Summary

Cute little sister spends all day every day with the brother she adores. They play games, they take baths, at bedtime she cradles his head in her lap. "Oniichan...... You're asleep, right? Definitely not awake......" Late at night, she gives him secret kisses and things. But the things have grown more daring... and now little sister has crossed a line. "I want oniichan's penis inside me..." [From DLsite English]

Densetsu no Yuusha to Saiyaku no Maou no Ren
Densetsu no Yuusha to Saiyaku no Maou no Ren'ai Jijou ~Yuusha wa Maou no Haha ni, Maou wa Yuusha no Mama ni Koi o Shita~
NAN%
Tags
  • Completion Status Indicator
  • Widow Heroine
  • Heroine with Children
  • Protagonist's Blood-related Mother as a Heroine
  • Only Non-Virgin Heroines
Rating 6.7122 Users
Ren
Ren'ai Kyoushitsu
NAN%
Tags
  • Former All-girls School
  • Teacher Support Character
  • White Haired Protagonist
  • Emotionless Heroine
  • Transfer Student Protagonist
Rating 6.1523 Users
Ero Imo Cyclone! ~Uzumaku Eroero wa Imouto o Chuushin ni Kyuusoku Kakudaichuu!~
Ero Imo Cyclone! ~Uzumaku Eroero wa Imouto o Chuushin ni Kyuusoku Kakudaichuu!~
NAN%
Tags
  • Family Life Comedy
  • Unavoidable Harem Ending
  • Polyamory
  • Triple Footjob
  • Boke Heroine
Rating 6.8424 Users
Inakan ~Kiseki no Ikigami Power de Junboku Musume ni Love Chuunyuu♥~
Inakan ~Kiseki no Ikigami Power de Junboku Musume ni Love Chuunyuu♥~
NAN%
Tags
  • Fictional Modern Day Japanese Countryside
  • Reincarnation
  • Gynecologist Chair
  • New Game Plus
  • Heroine with Tan Lines
Rating 6.5429 Users
Pako ☆ Sis ~Bitch na Imouto to Hame Pako Dousei Seikatsu~
Pako ☆ Sis ~Bitch na Imouto to Hame Pako Dousei Seikatsu~
NAN%
Tags
  • Gyaru Heroine
  • Consumption of Pornography
  • Only Blood-related Heroines
  • Only Protagonist's Sisters as Heroine(s)
  • Only Younger Heroines
Rating 6.6244 Users
Kiss x 800 ~Kiss de Gakuen Houkai? Houkago Hen~
Kiss x 800 ~Kiss de Gakuen Houkai? Houkago Hen~
NAN%
Tags
  • French Kiss
  • Library
  • School Sports Club Member Heroine
  • Kissing Scene
  • Heroine with Tan Lines
Rating 5.9615 Users
Tonari no Puu-san
Tonari no Puu-san
NAN%
Tags
  • Threesome Ending
  • Amnesia
  • Perverted Protagonist
  • Impregnation
  • Deredere Heroine
Rating 7.1661 Users
Chibi Pire! ~Kyuuketsu Shimai to Ecchi de Bitch na Dousei Seikatsu~
Chibi Pire! ~Kyuuketsu Shimai to Ecchi de Bitch na Dousei Seikatsu~
NAN%
Tags
  • Vampire Heroine
  • Only Loli Heroines
  • Hero(ine) Selection
  • Straight Lolicon
  • Heroine with Visible Panties
Rating 7.0788 Users
Yu no Machi Hitozuma Kikou ~Onsen de Nure Nure Desu!~
Yu no Machi Hitozuma Kikou ~Onsen de Nure Nure Desu!~
NAN%
Tags
  • Onsen
  • Heroine with Kimono
  • Infidelity
  • Sex with Sleepers
  • Only Adult Heroines
Rating 6.4919 Users
Onii-chan, Migite no Shiyou o Kinshi Shimasu! 2
Onii-chan, Migite no Shiyou o Kinshi Shimasu! 2
NAN%
Tags
  • Siscon Protagonist
  • Beach
  • Only Protagonist's Sisters as Heroine(s)
  • Protagonist's Full Sister as a Heroine
  • Summer
Rating 5.9427 Users
Little ☆ Twins ~Sugu ni Toriko ni Shiteageru♪~
Little ☆ Twins ~Sugu ni Toriko ni Shiteageru♪~
NAN%
Tags
  • Cousin Incest
  • Protagonist's Cousin as a Heroine
  • Twin Sisters as Heroines
  • Only Loli Heroines
  • Threesome Ending
Rating 6.2120 Users
Lovecha ~Tsumasakidachi de, Hitomi o Tojite~
Lovecha ~Tsumasakidachi de, Hitomi o Tojite~
NAN%
Tags
  • Elementary School
  • Elementary School Student Heroine
  • Only Loli Heroines
  • Student-Teacher Romance
  • Armpit Licking
Rating 6.2225 Users
Idol☆Gyaku Rape!! ~Tenshi-tachi no Omocha ni Natta Ore~
Idol☆Gyaku Rape!! ~Tenshi-tachi no Omocha ni Natta Ore~
NAN%
Tags
  • Heroine Based on a Fictional Person
  • Unnamed Protagonist
  • Reverse Rape
  • Idol Heroine
  • Japanese Idols
Rating 6.1426 Users
Kitten Philia
Kitten Philia
NAN%
Tags
  • Kemonomimi
  • Kemonomimi Support Character
  • Slave Protagonist
  • Kemonomimi Heroine
  • Clothed Female Naked Male
Rating 6.5126 Users
Hitozuma Saimin Keikaku ~Saimin Gonin de Katei Enman!~
Hitozuma Saimin Keikaku ~Saimin Gonin de Katei Enman!~
NAN%
Tags
  • Rounin Protagonist
  • Oyakodon Ending
  • Masturbation with Object
  • Heroine with Children
  • Masturbation
Rating 6.0221 Users
Koboreochiru Shoujo-tachi ~Papakatsu JC Kairaku Ochi no Kiroku~
Koboreochiru Shoujo-tachi ~Papakatsu JC Kairaku Ochi no Kiroku~
NAN%
Tags
  • Middle School Student Protagonist
  • Prostitute Protagonist
  • Sex Involving Prostitution
  • Middle School Student Heroine
  • Lolicon
Rating 6.7144 Users
Idol Shimai o Ecchi ni Produce!
Idol Shimai o Ecchi ni Produce!
NAN%
Tags
  • Only Blood-related Heroines
  • Only Protagonist's Sisters as Heroine(s)
  • Foreskin Play
  • Only Avoidable Heroine Having Sex with Others
  • Protagonist's Older Sister as a Heroine
Rating 6.6344 Users
Houkago ni Midareru Ane Kyoushi to Tonari no Heya de Aegu Imouto ~Koibito ni Natta Onna no Ko ga, Shiriai no Iya na Otoko ni Netorareru~
Houkago ni Midareru Ane Kyoushi to Tonari no Heya de Aegu Imouto ~Koibito ni Natta Onna no Ko ga, Shiriai no Iya na Otoko ni Netorareru~
NAN%
Tags
  • Netorare Type B
  • Protagonist's Non-blood-related Sister as a Heroine
  • Shimaidon
  • Middle School Student Heroine
  • Netorare
Rating 6.4323 Users
Fudeoroshi Mama ~Afureru Hakudaku & Milk~
Fudeoroshi Mama ~Afureru Hakudaku & Milk~
NAN%
Tags
  • Obacon
  • Non-blood-related Mother/Son Incest
  • Protagonist's Non-blood-related Mother as a Heroine
  • Only Older Heroines
  • Widow Heroine
Rating 5.7522 Users
Gusha no Kyouben ~Ima Shika Dekinai Koto ga Takusan Arun Da!~
Gusha no Kyouben ~Ima Shika Dekinai Koto ga Takusan Arun Da!~
NAN%
Tags
  • Shota Support Character
  • Family
  • Straight Shotacon
  • Countryside
  • Only Loli Heroines
Rating 7.2371 Users
Wakagaeri Haha ~Kuchiurusai Oba-san ga Bishoujo ni Naru Nante Hansoku desho!?~
Wakagaeri Haha ~Kuchiurusai Oba-san ga Bishoujo ni Naru Nante Hansoku desho!?~
NAN%
Tags
  • Rejuvenation
  • Heroine in Relationship with Other(s)
  • Only Blood-related Heroines
  • Only Older Heroines
  • Blood-related Mother/Son Incest
Rating 5.5424 Users
Do M Imouto no Roshutsu Yuugi ~Dare ni mo Ienai Himitsu no Asobi~
Do M Imouto no Roshutsu Yuugi ~Dare ni mo Ienai Himitsu no Asobi~
NAN%
Tags
  • Live Sexual Broadcast
  • Brother/Sister Incest
  • Only Protagonist's Sisters as Heroine(s)
  • Protagonist's Younger Sister as a Heroine
  • Perverted Heroine
Rating 5.8120 Users
Tropical Vacation
Tropical Vacation
NAN%
Tags
  • Resort
  • Childishly Violent Heroine
  • Otaku Friend
  • Voice Only Parts
  • Martial Artist Heroine
Rating 6.7930 Users
Casablanca no Tsubomi
Casablanca no Tsubomi
NAN%
Tags
  • Photographer Protagonist
  • Jealousy
  • Discreet Masturbation
  • Long Common Route
  • Bad Endings with Story
Rating 6.5532 Users
Mai Yome ~My Yome~
Mai Yome ~My Yome~
41%
Tags
  • Sex Involving Children
  • Only Younger Heroines
  • Only Protagonist's Sisters as Heroine(s)
  • Only Loli Heroines
  • Deredere Heroine
Rating 5.6020 Users
Niina-chan Lovely Life
Niina-chan Lovely Life
38%
Tags
  • Indecisive Protagonist
  • Unavoidable Harem Ending
  • Oppai Loli Heroine
  • Defloration During Common Route
  • Mischievous Heroine
Rating 6.6021 Users
Kitten Philia
Kitten Philia
32%
Tags
  • Kemonomimi
  • Kemonomimi Support Character
  • Slave Protagonist
  • Kemonomimi Heroine
  • Clothed Female Naked Male
Rating 6.5126 Users
Idol☆Gyaku Rape!! ~Tenshi-tachi no Omocha ni Natta Ore~
Idol☆Gyaku Rape!! ~Tenshi-tachi no Omocha ni Natta Ore~
30%
Tags
  • Heroine Based on a Fictional Person
  • Unnamed Protagonist
  • Reverse Rape
  • Idol Heroine
  • Japanese Idols
Rating 6.1426 Users
Lovecha ~Tsumasakidachi de, Hitomi o Tojite~
Lovecha ~Tsumasakidachi de, Hitomi o Tojite~
29%
Tags
  • Elementary School
  • Elementary School Student Heroine
  • Only Loli Heroines
  • Student-Teacher Romance
  • Armpit Licking
Rating 6.2225 Users
Onii-chan, Migite no Shiyou o Kinshi Shimasu! 2
Onii-chan, Migite no Shiyou o Kinshi Shimasu! 2
29%
Tags
  • Siscon Protagonist
  • Beach
  • Only Protagonist's Sisters as Heroine(s)
  • Protagonist's Full Sister as a Heroine
  • Summer
Rating 5.9427 Users
Little ☆ Twins ~Sugu ni Toriko ni Shiteageru♪~
Little ☆ Twins ~Sugu ni Toriko ni Shiteageru♪~
28%
Tags
  • Cousin Incest
  • Protagonist's Cousin as a Heroine
  • Twin Sisters as Heroines
  • Only Loli Heroines
  • Threesome Ending
Rating 6.2120 Users
Chibi Pire! ~Kyuuketsu Shimai to Ecchi de Bitch na Dousei Seikatsu~
Chibi Pire! ~Kyuuketsu Shimai to Ecchi de Bitch na Dousei Seikatsu~
26%
Tags
  • Vampire Heroine
  • Only Loli Heroines
  • Hero(ine) Selection
  • Straight Lolicon
  • Heroine with Visible Panties
Rating 7.0788 Users
Yu no Machi Hitozuma Kikou ~Onsen de Nure Nure Desu!~
Yu no Machi Hitozuma Kikou ~Onsen de Nure Nure Desu!~
25%
Tags
  • Onsen
  • Heroine with Kimono
  • Infidelity
  • Sex with Sleepers
  • Only Adult Heroines
Rating 6.4919 Users
Koboreochiru Shoujo-tachi ~Papakatsu JC Kairaku Ochi no Kiroku~
Koboreochiru Shoujo-tachi ~Papakatsu JC Kairaku Ochi no Kiroku~
25%
Tags
  • Middle School Student Protagonist
  • Prostitute Protagonist
  • Sex Involving Prostitution
  • Middle School Student Heroine
  • Lolicon
Rating 6.7144 Users
Houkago ni Midareru Ane Kyoushi to Tonari no Heya de Aegu Imouto ~Koibito ni Natta Onna no Ko ga, Shiriai no Iya na Otoko ni Netorareru~
Houkago ni Midareru Ane Kyoushi to Tonari no Heya de Aegu Imouto ~Koibito ni Natta Onna no Ko ga, Shiriai no Iya na Otoko ni Netorareru~
25%
Tags
  • Netorare Type B
  • Protagonist's Non-blood-related Sister as a Heroine
  • Shimaidon
  • Middle School Student Heroine
  • Netorare
Rating 6.4323 Users
Gusha no Kyouben ~Ima Shika Dekinai Koto ga Takusan Arun Da!~
Gusha no Kyouben ~Ima Shika Dekinai Koto ga Takusan Arun Da!~
24%
Tags
  • Shota Support Character
  • Family
  • Straight Shotacon
  • Countryside
  • Only Loli Heroines
Rating 7.2371 Users
Do M Imouto no Roshutsu Yuugi ~Dare ni mo Ienai Himitsu no Asobi~
Do M Imouto no Roshutsu Yuugi ~Dare ni mo Ienai Himitsu no Asobi~
23%
Tags
  • Live Sexual Broadcast
  • Brother/Sister Incest
  • Only Protagonist's Sisters as Heroine(s)
  • Protagonist's Younger Sister as a Heroine
  • Perverted Heroine
Rating 5.8120 Users
Casablanca no Tsubomi
Casablanca no Tsubomi
23%
Tags
  • Photographer Protagonist
  • Jealousy
  • Discreet Masturbation
  • Long Common Route
  • Bad Endings with Story
Rating 6.5532 Users
Natsu Ecchi ~Mei to Inaka no Natsuyasumi~
Natsu Ecchi ~Mei to Inaka no Natsuyasumi~
23%
Tags
  • Blood-related Uncle/Niece Incest
  • Countryside
  • Protagonist's Niece as a Heroine
  • Summer
  • Straight Lolicon
Rating 5.9030 Users
Saimin Iinchou
Saimin Iinchou
23%
Tags
  • Student Council President Protagonist
  • Student Council Member Heroine
  • Mind Control
  • Feet Licking
  • Tribadism on Penis
Rating 6.9627 Users
Love Cafe ~Doutei na Ore demo, Kyonyuu Onna Senpai to Dousei Dekirutte Maji Desu ka?
Love Cafe ~Doutei na Ore demo, Kyonyuu Onna Senpai to Dousei Dekirutte Maji Desu ka?
23%
Tags
  • Poor Protagonist
  • Cafe
  • Bunnygirl Cosplay
  • Only Adult Heroines
  • Nursing Handjob
Rating 7.0022 Users
Little Do S Bitch ~Sensee no Koto, Ijimete A-ge-ru
Little Do S Bitch ~Sensee no Koto, Ijimete A-ge-ru
23%
Tags
  • Ballbusting
  • Paraphilic Infantilism
  • Urethral Sounding
  • Manual Prostate Stimulation
  • Cock and Ball Torture
Rating 6.0730 Users
Maid to no Amai Seikatsu
Maid to no Amai Seikatsu
23%
Tags
  • Blood-related Aunt/Nephew Incest
  • Protagonist's Aunt as a Heroine
  • Only Older Heroines
  • Shota Protagonist
  • Straight Shotacon
Rating 5.9723 Users
Papa, Dakishimete Ageru ~Babumi na Manamusume no Bosei ni Amaete Nakadashi Zanmai~
Papa, Dakishimete Ageru ~Babumi na Manamusume no Bosei ni Amaete Nakadashi Zanmai~
23%
Tags
  • Fathercon Heroine
  • Protagonist's Blood-related Daughter as a Heroine
  • Blood-related Father/Daughter Incest
  • Widow(er) Protagonist
  • Sex on a Roof
Rating 6.2721 Users
Ore ni Kanojo ga Dekite kara Imouto-tachi no Yousu ga Okashii!?
Ore ni Kanojo ga Dekite kara Imouto-tachi no Yousu ga Okashii!?
23%
Tags
  • Reverse Netorare
  • Protagonist's Sister as a Heroine
  • Brother/Sister Incest
  • Only Protagonist's Sisters as Heroine(s)
  • Only Younger Heroines
Rating 6.9035 Users
Nyotai Inkan ~Utsurikawaru Chijokuteki Koukishin~
Nyotai Inkan ~Utsurikawaru Chijokuteki Koukishin~
23%
Tags
  • Body Swapping
  • Masturbation with Object
  • Sex Involving Prostitution
  • Mutual Masturbation
  • Lesbian Sex
Rating 5.8820 Users
Onii-chan Teacher ~Himitsu no Jugyou o Kibou Shimasu!~
Onii-chan Teacher ~Himitsu no Jugyou o Kibou Shimasu!~
22%
Tags
  • Braless Heroine
  • Heroine with Flat Chest (Non-Loli)
  • Sexually Oblivious Heroine
  • Only Blood-related Heroines
  • Only Protagonist's Sisters as Heroine(s)
Rating 6.8850 Users
Futaimo Days ~Onii-chan, Naisho de Shiyo♪~
Futaimo Days ~Onii-chan, Naisho de Shiyo♪~
22%
Tags
  • Shimaidon with Twins Ending
  • Twin Bellyjob
  • Twin Sisters as Heroines
  • Threesome Ending
  • Unavoidable Harem Ending
Rating 5.8919 Users

Onii-chan Nechatta? 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 (26 total)

NameScoreImportanceWeight
Incest Romance3.002.256.75
Sex Involving Children3.001.955.85
Protagonist's Full Sister as a Heroine3.001.875.62
Deredere Heroine3.001.614.84
Straight Lolicon3.001.504.51
Blood-related Brother/Sister Incest3.001.494.46
Only Blood-related Heroines2.002.104.21
Brocon Heroine2.501.614.03
Protagonist as the Only Male2.001.993.99
Only Protagonist's Sisters as Heroine(s)2.001.993.98
Only Younger Heroines2.001.943.89
Sex with Sleepers2.001.913.82
Wake-up Sex2.001.813.62
Only Loli Heroines2.001.773.54
Only Virgin Heroines3.001.083.25
Only a Single Heroine3.001.023.06
Perverted Heroine2.001.402.80
Sounds of Copulation2.001.292.58
Sex with Protagonist Only2.001.132.26
Kinetic Novel2.001.072.15
Single Blowjob2.000.971.93
Cunnilingus2.000.931.86
Defloration2.000.761.52
Male Protagonist3.000.300.91
Blowjob0.331.110.37
ADV2.000.150.29

Traits (24 total)

NameCharactersImportanceWeight
Animal Pajamas Clothes13.492.42
Elementary School Student Role12.521.74
Wake-up Sex Engages in (Sexual)12.361.64
Rubber Band With Beads Clothes12.221.54
Flat Chest Body12.091.45
Deredere Personality11.741.21
Sex with Protagonist Only Engages in (Sexual)11.681.16
Pink Eyes11.621.12
Full Sister Role11.571.09
Incest Engages in (Sexual)11.471.02
Seventh Posture Subject of (Sexual)11.461.01
Masturbation Engages in (Sexual)11.390.96
Kid Body11.370.95
Tominagi Subject of (Sexual)11.360.94
Handjob Engages in (Sexual)11.160.80
Sitting Sex Subject of (Sexual)11.060.74
Parted to Side Hair11.050.73
Sidehair Hair10.980.68
Cowgirl Subject of (Sexual)10.950.66
Straight Hair10.950.66
Virgin Sex Engages in (Sexual)10.850.59
Black Hair10.810.56
Blowjob Engages in (Sexual)10.760.53
Pale Body10.370.26