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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]

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 6.6343 Users
Onii-chan Teacher ~Himitsu no Jugyou o Kibou Shimasu!~
Onii-chan Teacher ~Himitsu no Jugyou o Kibou Shimasu!~
NAN%
Tags
  • Braless Heroine
  • Heroine with Flat Chest (Non-Loli)
  • Sexually Oblivious Heroine
  • Only Blood-related Heroines
  • Only Protagonist's Sisters as Heroine(s)
Rating 6.8851 Users
Soushisouai Lolita no Seikatsu
Soushisouai Lolita no Seikatsu
NAN%
Tags
  • Heroine with Pre-story Virginity Loss to the Protagonist
  • Salaryman Protagonist
  • May-December Romance
  • Orphan Heroine
  • Pure Love Story
Rating 6.7964 Users
Nyanto Suteki na Natsuiro Days
Nyanto Suteki na Natsuiro Days
NAN%
Tags
  • Resort
  • Brocon Support Character
  • Catgirl Heroine
  • Unavoidable Harem Ending
  • Protagonist's Sister as a Support Character
Rating 6.7927 Users
Akogare no Seiso na Fuuki Iinchou to Gyaru Imouto no Rannyuu Namahame Live Haishin
Akogare no Seiso na Fuuki Iinchou to Gyaru Imouto no Rannyuu Namahame Live Haishin
NAN%
Tags
  • Anal Object Insertion
  • Shimaidon
  • Gyaru Heroine
  • Anal Sex
  • Single Blowjob
Rating 6.7423 Users
Do M Imouto Onedari Kojin Lesson ~Watashi no SEX Katei Kyoushi Onii-chan~
Do M Imouto Onedari Kojin Lesson ~Watashi no SEX Katei Kyoushi Onii-chan~
NAN%
Tags
  • Protagonist's Non-blood-related Sister as a Heroine
  • Shimaidon Ending
  • Office Lady Heroine
  • Protagonist's Sister as a Heroine
  • Masochist Heroine
Rating 6.7949 Users
Kanojo no Imouto to Himitsu no Stay Home ~Uchiki Musume ga Haitoku Netori!~
Kanojo no Imouto to Himitsu no Stay Home ~Uchiki Musume ga Haitoku Netori!~
NAN%
Tags
  • Reverse Netorare
  • Shimaidon
  • Completion Status Indicator
  • Shimaidon Ending
  • Short Sexual Scenes
Rating 5.9768 Users
Nikukyun Ongaeshi ~Tasuketa 2hiki ga Onna no Ko ni Natte Yattekita~
Nikukyun Ongaeshi ~Tasuketa 2hiki ga Onna no Ko ni Natte Yattekita~
NAN%
Tags
  • No Common Sense Heroine
  • Doggirl Heroine
  • Sudden Girlfriend Appearance
  • Catgirl Heroine
  • Comedic Love Triangle
Rating 6.9315 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
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
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
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 6.7044 Users
Kitten Philia
Kitten Philia
NAN%
Tags
  • Kemonomimi
  • Kemonomimi Support Character
  • Slave Protagonist
  • Kemonomimi Heroine
  • Clothed Female Naked Male
Rating 6.5126 Users
M.C. Saimin Kenkyuu
M.C. Saimin Kenkyuu
NAN%
Tags
  • Cat Cosplay
  • Sexual Roleplay
  • Erotic Mind Control
  • Mind Control
  • Sexual Cosplay
Rating 6.5227 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 7.0688 Users
Gokinjo Zukiai ~Rinjin Bijin Oyako Kousai~
Gokinjo Zukiai ~Rinjin Bijin Oyako Kousai~
NAN%
Tags
  • Heroine with Anal Hair
  • Oyakodon Ending
  • Sex with Sleepers
  • Sexual Devices
  • Condoms
Rating 6.5020 Users
Kami-sama no Mimi wa Kemonomimi!?
Kami-sama no Mimi wa Kemonomimi!?
NAN%
Tags
  • Kitsune Heroine
  • Goddess Heroine
  • Catgirl Heroine
  • Heroine with a Fang
  • Threesome Ending
Rating 6.4512 Users
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
Ore ni Kanojo ga Dekite kara Imouto-tachi no Yousu ga Okashii!?
Ore ni Kanojo ga Dekite kara Imouto-tachi no Yousu ga Okashii!?
NAN%
Tags
  • Reverse Netorare
  • Protagonist's Sister as a Heroine
  • Brother/Sister Incest
  • Only Protagonist's Sisters as Heroine(s)
  • Protagonist's Blood-related Sister as a Heroine
Rating 6.8636 Users
memories
memories
NAN%
Tags
  • Relationship Problems
  • Lesbian Protagonist
  • No Saves
  • Depression
  • No Skip Function
Rating 6.1620 Users
Kazoku Houkai -Me no Mae de Ubawareteiku Ore no Kazoku-
Kazoku Houkai -Me no Mae de Ubawareteiku Ore no Kazoku-
NAN%
Tags
  • Non-blood-related Mother/Son Incest
  • Protagonist's Non-blood-related Mother as a Heroine
  • Heroine with Children
  • Protagonist's Girlfriend as a Heroine
  • Western-style Manor
Rating 6.1611 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
Saimin Choukyou Shimai
Saimin Choukyou Shimai
NAN%
Tags
  • Heroine Sisters
  • Erotic Mind Control
  • Mind Control
  • Sex with Others
  • Protagonist's Older Sister as a Heroine
Rating 5.8816 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 6.6022 Users
Kitten Philia
Kitten Philia
32%
Tags
  • Kemonomimi
  • Kemonomimi Support Character
  • Slave Protagonist
  • Kemonomimi Heroine
  • Clothed Female Naked Male
Rating 6.5126 Users
Koboreochiru Shoujo-tachi ~Papakatsu JC Kairaku Ochi no Kiroku~
Koboreochiru Shoujo-tachi ~Papakatsu JC Kairaku Ochi no Kiroku~
30%
Tags
  • Middle School Student Protagonist
  • Prostitute Protagonist
  • Sex Involving Prostitution
  • Middle School Student Heroine
  • Lolicon
Rating 6.7044 Users
Idol☆Gyaku Rape!! ~Tenshi-tachi no Omocha ni Natta Ore~
Idol☆Gyaku Rape!! ~Tenshi-tachi no Omocha ni Natta Ore~
29%
Tags
  • Heroine Based on a Fictional Person
  • Unnamed Protagonist
  • Reverse Rape
  • Idol Heroine
  • Japanese Idols
Rating 6.1426 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
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
Nikukyun Ongaeshi ~Tasuketa 2hiki ga Onna no Ko ni Natte Yattekita~
Nikukyun Ongaeshi ~Tasuketa 2hiki ga Onna no Ko ni Natte Yattekita~
28%
Tags
  • No Common Sense Heroine
  • Doggirl Heroine
  • Sudden Girlfriend Appearance
  • Catgirl Heroine
  • Comedic Love Triangle
Rating 6.9315 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 7.0688 Users
Kami-sama no Mimi wa Kemonomimi!?
Kami-sama no Mimi wa Kemonomimi!?
25%
Tags
  • Kitsune Heroine
  • Goddess Heroine
  • Catgirl Heroine
  • Heroine with a Fang
  • Threesome Ending
Rating 6.4512 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!?
25%
Tags
  • Reverse Netorare
  • Protagonist's Sister as a Heroine
  • Brother/Sister Incest
  • Only Protagonist's Sisters as Heroine(s)
  • Protagonist's Blood-related Sister as a Heroine
Rating 6.8636 Users
Kazoku Houkai -Me no Mae de Ubawareteiku Ore no Kazoku-
Kazoku Houkai -Me no Mae de Ubawareteiku Ore no Kazoku-
25%
Tags
  • Non-blood-related Mother/Son Incest
  • Protagonist's Non-blood-related Mother as a Heroine
  • Heroine with Children
  • Protagonist's Girlfriend as a Heroine
  • Western-style Manor
Rating 6.1611 Users
Saimin Choukyou Shimai
Saimin Choukyou Shimai
25%
Tags
  • Heroine Sisters
  • Erotic Mind Control
  • Mind Control
  • Sex with Others
  • Protagonist's Older Sister as a Heroine
Rating 5.8816 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
Tsuma no Kyonyuu Ane to Tsundere Imouto kara no Inmitsu Yuuwaku ~Barete wa Ikenai Kateinai Furin~
Tsuma no Kyonyuu Ane to Tsundere Imouto kara no Inmitsu Yuuwaku ~Barete wa Ikenai Kateinai Furin~
25%
Tags
  • In-law Incest
  • Protagonist's Sister-in-Law as a Heroine
  • School Nurse Heroine
  • Completion Status Indicator
  • Masturbation in front of an Audience
Rating 6.6415 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 5.8020 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 5.8930 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 6.9921 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 6.0630 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
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
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 5.9722 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 Heroine3.001.865.58
Deredere Heroine3.001.614.84
Straight Lolicon3.001.504.50
Blood-related Brother/Sister Incest3.001.484.45
Only Blood-related Heroines2.002.094.17
Brocon Heroine2.501.614.01
Only Protagonist's Sisters as Heroine(s)2.001.993.98
Protagonist as the Only Male2.001.983.96
Only Younger Heroines2.001.943.88
Sex with Sleepers2.001.903.81
Wake-up Sex2.001.813.62
Only Loli Heroines2.001.783.55
Only Virgin Heroines3.001.083.24
Only a Single Heroine3.001.023.05
Perverted Heroine2.001.392.79
Sounds of Copulation2.001.292.58
Sex with Protagonist Only2.001.132.26
Kinetic Novel2.001.072.14
Single Blowjob2.000.951.91
Cunnilingus2.000.931.86
Defloration2.000.761.52
Male Protagonist3.000.300.90
Blowjob0.331.120.37
ADV2.000.140.29

Traits (24 total)

NameCharactersImportanceWeight
Animal Pajamas Clothes13.472.40
Elementary School Student Role12.521.75
Wake-up Sex Engages in (Sexual)12.361.63
Rubber Band With Beads Clothes12.231.54
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 Role11.561.08
Incest Engages in (Sexual)11.471.02
Seventh Posture Subject of (Sexual)11.461.01
Masturbation Engages in (Sexual)11.390.97
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 Hair10.940.65
Virgin Sex Engages in (Sexual)10.850.59
Black Hair10.800.56
Blowjob Engages in (Sexual)10.760.53
Pale Body10.370.26