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Summary

Koichi Akiyama, an ordinary 22-year-old game developer, has been living a boring life until one day his younger sister Ai paid him a visit. Soon after Ai moves in with Koichi, she claims that she wants to become a game developer too, so her brother has to teach her everything he knows. The only problem is that Ai wants to create Hentai games, which puts Koichi in a dubious position. From now on these two need to learn how to work together and explore all the difficulties of writing Hentai stories. [From Steam]

Momoiro Renge ~Shimai to Tsumugu Ecchi na Kankei~
Momoiro Renge ~Shimai to Tsumugu Ecchi na Kankei~
NAN%
Tags
  • Only Protagonist's Sisters as Heroine(s)
  • Defloration During Common Route
  • Brother/Sister Incest
  • Orphan Heroine
  • Sex Under the Necessity
Rating 5.95108 Users
Yaruge Girl Triona
Yaruge Girl Triona
NAN%
Tags
  • Sexual Scenes with Gameplay
  • Half-Japanese Protagonist
  • Protagonist's Wife as a Heroine
  • Customization
  • Episodic Story
Rating 3.6243 Users
Harem Mate
Harem Mate
NAN%
Tags
  • Realtime 3D
  • Free Camera
  • Manager Protagonist
  • Anime-looking 3D
  • Idol Heroine
Rating 5.9527 Users
Riajuu Plus ver. Komatsuzaki Kaname
Riajuu Plus ver. Komatsuzaki Kaname
NAN%
Tags
  • Passage of Time
  • Avoidable Netorare (obsolete)
  • Otaku Protagonist
  • Coming-of-Age Drama
  • More Than Seven Endings
Rating 5.32195 Users
Yume wo Mita
Yume wo Mita
NAN%
Tags
  • No Common Sense Heroine
  • Mage Heroine
  • No Background Music
  • Brief NVL Scenes
  • Loli Heroine
Rating 5.4934 Users
Dosukebe Mama♪ ~Boku no Mama wa, (Seiteki ni) Chou Kahogo~
Dosukebe Mama♪ ~Boku no Mama wa, (Seiteki ni) Chou Kahogo~
NAN%
Tags
  • Reverse Netorare
  • Protagonist's Blood-related Mother as a Heroine
  • Blood-related Mother/Son Incest
  • Consensual Phone Sex
  • Discreet Masturbation
Rating 5.5924 Users
Princess X FD ~Iinazuke wa Owaranai!?~
Princess X FD ~Iinazuke wa Owaranai!?~
NAN%
Tags
  • Monster Girl Support Character
  • Monster Girl Heroine
  • Sex with Monster Girls
  • Alien Heroine
  • Modern Tsundere Heroine
Rating 6.1683 Users
Yozora Rhapsody
Yozora Rhapsody
NAN%
Tags
  • Daughter Support Character
  • Protagonist's Wife as a Heroine
  • Family
  • Beach
  • Island
Rating 4.8354 Users
My Strange Sis
My Strange Sis
NAN%
Tags
  • Sexual Scenes with Gameplay
  • Incest Romance
  • Brother/Sister Incest
  • Customization
  • Protagonist's Sister as a Heroine
Rating 5.7221 Users
Eroi
Eroi
NAN%
Tags
  • Hospital
  • Sexual Scenes with Gameplay
  • Medical Doctor Protagonist
  • Realtime 3D
  • Interactive Touching Game
Rating 5.3224 Users
Hitozuma Dorei Kissa 2
Hitozuma Dorei Kissa 2
NAN%
Tags
  • Rape with Blackmail
  • Blackmail
  • Waitress Heroine
  • Lactation During Sex
  • Group Sex of Multiple Females and Males
Rating 5.7922 Users
Kiss the Cock
Kiss the Cock
NAN%
Tags
  • Cook Protagonist
  • Cook Heroine
  • Food Discussions
  • Food Gokkun
  • Cum on Food
Rating 5.1629 Users
Siscon -Saiminjutsushi Onii-chan to Namaiki na Imouto-
Siscon -Saiminjutsushi Onii-chan to Namaiki na Imouto-
NAN%
Tags
  • Brother/Sister Incest
  • Chuunibyou Protagonist
  • Erotic Mind Control
  • Only Blood-related Heroines
  • Siscon Protagonist
Rating 6.2422 Users
Nanpa Nama Hame Nakadashi Banzai 4
Nanpa Nama Hame Nakadashi Banzai 4
NAN%
Tags
  • Nanpa
  • Playboy Protagonist
  • Metropolitan Area
  • Modern Day Shibuya
  • Narrating Others' Thoughts
Rating 6.2168 Users
Bracon! Nazusa Onee-chan no Seikatsu Hogo
Bracon! Nazusa Onee-chan no Seikatsu Hogo
NAN%
Tags
  • School Nurse Heroine
  • Brocon Heroine
  • Blood-related Brother/Sister Incest
  • Only Blood-related Heroines
  • Only Older Heroines
Rating 6.7743 Users
Nanpa Nama Hame Nakadashi Banzai 5
Nanpa Nama Hame Nakadashi Banzai 5
NAN%
Tags
  • Nanpa
  • Playboy Protagonist
  • Beach
  • Sex on a Beach
  • Long Sexual Scenes
Rating 6.4138 Users
Love Love Otoko no Ko Ryou ~Boku o Ubaiau Otouto to Net Idol
Love Love Otoko no Ko Ryou ~Boku o Ubaiau Otouto to Net Idol
NAN%
Tags
  • Group Sex of Several Males
  • Only Trap Heroines
  • Blood-related Brother/Brother Incest
  • Reversible Yaoi Pairing
  • Half-Japanese Hero
Rating 5.9426 Users
Happy Campers
Happy Campers
NAN%
Tags
  • Summer Camp
  • Forest
  • Protagonist Gender Choice
  • American Heroine
  • No Common Sense Heroine
Rating 4.5056 Users
All The Better To See You
All The Better To See You
NAN%
Tags
  • No Saves
  • No Backlog
  • Pixel Art
  • Breaking the Fourth Wall
  • Fairy Tale
Rating 4.9622 Users
Kawaime M Maid-san no Oshigoto SM Lesson ~Goichizoku ni Tsutawaru Higi o, Sendai-sama ni Kawatte Godenju Itashimasu~
Kawaime M Maid-san no Oshigoto SM Lesson ~Goichizoku ni Tsutawaru Higi o, Sendai-sama ni Kawatte Godenju Itashimasu~
NAN%
Tags
  • Vacuum Bed
  • BDSM
  • Sexual Slavery (Consensual)
  • Maid Heroine
  • Whipping
Rating 5.4841 Users
Sakura Forest Girls 2
Sakura Forest Girls 2
NAN%
Tags
  • Dark Skinned Protagonist
  • Girl x Girl Romance Only
  • Female Protagonist
  • Protagonist with a Face
  • Sexual Content
Rating 5.9821 Users
Inraku Counseling ~Otto no Me no Mae de, Tsuma wa Honshou ni Ochiteyuku~
Inraku Counseling ~Otto no Me no Mae de, Tsuma wa Honshou ni Ochiteyuku~
NAN%
Tags
  • Netori
  • Medical Doctor Protagonist
  • Remote-controlled Vibrator
  • Urination Fetish
  • Piledriver
Rating 5.3844 Users
Polygon Love 2
Polygon Love 2
NAN%
Tags
  • Realtime 3D
  • Customization
  • Anime-looking 3D
  • Imouto-type Heroine
  • Footjob
Rating 5.53100 Users
Hoshi no Furu Oka
Hoshi no Furu Oka
NAN%
Tags
  • Late Branching Plot
  • NVL
  • Photographic Backgrounds
  • High School Student Protagonist
  • Only a Single Heroine
Rating 5.3154 Users
Naisho no Natsuyasumi
Naisho no Natsuyasumi
16%
Tags
  • Only Loli Heroines
  • Lolicon
  • Straight Lolicon
  • Sex Involving Children
  • Loli Heroine
Rating 5.5423 Users
SF
SF
13%
Tags
  • Promiscuous Heroine
  • Realtime 3D
  • Few Choices
  • Anime-looking 3D
  • Only Non-Virgin Heroines
Rating 6.2937 Users
Nanpa Nama Hame Nakadashi Banzai 4
Nanpa Nama Hame Nakadashi Banzai 4
12%
Tags
  • Nanpa
  • Playboy Protagonist
  • Metropolitan Area
  • Modern Day Shibuya
  • Narrating Others' Thoughts
Rating 6.2168 Users
Siscon -Saiminjutsushi Onii-chan to Namaiki na Imouto-
Siscon -Saiminjutsushi Onii-chan to Namaiki na Imouto-
11%
Tags
  • Brother/Sister Incest
  • Chuunibyou Protagonist
  • Erotic Mind Control
  • Only Blood-related Heroines
  • Siscon Protagonist
Rating 6.2422 Users
Kiss the Cock
Kiss the Cock
11%
Tags
  • Cook Protagonist
  • Cook Heroine
  • Food Discussions
  • Food Gokkun
  • Cum on Food
Rating 5.1629 Users
Eroi
Eroi
10%
Tags
  • Hospital
  • Sexual Scenes with Gameplay
  • Medical Doctor Protagonist
  • Realtime 3D
  • Interactive Touching Game
Rating 5.3224 Users
Hitozuma Dorei Kissa 2
Hitozuma Dorei Kissa 2
10%
Tags
  • Rape with Blackmail
  • Blackmail
  • Waitress Heroine
  • Lactation During Sex
  • Group Sex of Multiple Females and Males
Rating 5.7922 Users
Yozora Rhapsody
Yozora Rhapsody
10%
Tags
  • Daughter Support Character
  • Protagonist's Wife as a Heroine
  • Family
  • Beach
  • Island
Rating 4.8354 Users
My Strange Sis
My Strange Sis
10%
Tags
  • Sexual Scenes with Gameplay
  • Incest Romance
  • Brother/Sister Incest
  • Customization
  • Protagonist's Sister as a Heroine
Rating 5.7221 Users
Nanpa Nama Hame Nakadashi Banzai 5
Nanpa Nama Hame Nakadashi Banzai 5
10%
Tags
  • Nanpa
  • Playboy Protagonist
  • Beach
  • Sex on a Beach
  • Long Sexual Scenes
Rating 6.4138 Users
Happy Campers
Happy Campers
9%
Tags
  • Summer Camp
  • Forest
  • Protagonist Gender Choice
  • American Heroine
  • No Common Sense Heroine
Rating 4.5056 Users
Kawaime M Maid-san no Oshigoto SM Lesson ~Goichizoku ni Tsutawaru Higi o, Sendai-sama ni Kawatte Godenju Itashimasu~
Kawaime M Maid-san no Oshigoto SM Lesson ~Goichizoku ni Tsutawaru Higi o, Sendai-sama ni Kawatte Godenju Itashimasu~
9%
Tags
  • Vacuum Bed
  • BDSM
  • Sexual Slavery (Consensual)
  • Maid Heroine
  • Whipping
Rating 5.4841 Users
Inraku Counseling ~Otto no Me no Mae de, Tsuma wa Honshou ni Ochiteyuku~
Inraku Counseling ~Otto no Me no Mae de, Tsuma wa Honshou ni Ochiteyuku~
9%
Tags
  • Netori
  • Medical Doctor Protagonist
  • Remote-controlled Vibrator
  • Urination Fetish
  • Piledriver
Rating 5.3844 Users
Hoshi no Furu Oka
Hoshi no Furu Oka
9%
Tags
  • Late Branching Plot
  • NVL
  • Photographic Backgrounds
  • High School Student Protagonist
  • Only a Single Heroine
Rating 5.3154 Users
Winter
Winter's Empty Mask
9%
Tags
  • Horror
  • Mystery
  • RPG
  • Male Protagonist
Rating 5.8420 Users
Miai Kekkon Shita Osanazuma ga Otoko no Ko Datta Ken
Miai Kekkon Shita Osanazuma ga Otoko no Ko Datta Ken
9%
Tags
  • Only Trap Heroines
  • Male Pregnancy
  • Hero with Beauty Mark
  • Arranged Marriage
  • Protagonist's Wife as a Heroine
Rating 5.8823 Users
Yan Moe Futago Shimai ~Yande Harande Ai Sarete...~
Yan Moe Futago Shimai ~Yande Harande Ai Sarete...~
8%
Tags
  • Heroine with Baby Complex
  • Shimaidon with Twins Ending
  • Shimaidon Ending
  • Twin Sisters as Heroines
  • Yandere Heroine
Rating 6.4640 Users
Dahlia
Dahlia
8%
Tags
  • France
  • 19th Century
  • Europe
  • Lesbian Protagonist
  • Past Earth
Rating 5.2956 Users
Flatcheez 2
Flatcheez 2
8%
Tags
  • Elementary School
  • Elementary School Student Protagonist
  • Urban Legend
  • Non-penetrative Sex
  • Shotacon Heroine
Rating 7.33127 Users
Flatcheez
Flatcheez
8%
Tags
  • Elementary School Student Protagonist
  • Elementary School
  • Side Character Having Sex with Others
  • Child Support Character
  • Transfer Student Protagonist
Rating 6.43160 Users
Daikon
Daikon
8%
Tags
  • Raising Simulation
  • No Saves
  • No Background Music
  • No Backlog
  • Pixel Art
Rating 4.9222 Users
Ore no Imouto wa Seijun Bitch ~Oya ni wa Himitsu no Hamehame Seikatsu~
Ore no Imouto wa Seijun Bitch ~Oya ni wa Himitsu no Hamehame Seikatsu~
8%
Tags
  • Only Younger Heroines
  • Only Blood-related Heroines
  • Discreet Phone Sex
  • Only Protagonist's Sisters as Heroine(s)
  • Single Buttjob
Rating 6.6835 Users
Boku Kano 3 ~ Otoko no Ko o Suki ni Naru Jun
Boku Kano 3 ~ Otoko no Ko o Suki ni Naru Jun'ai Triangle + 1
8%
Tags
  • Shotacon Protagonist
  • Brother/Brother Incest
  • Male on Male Sex Only
  • Trap Heroine
  • Male on Trap
Rating 6.3124 Users
The Mensetsu ~Naitei Hoshikerya Wakaru Daro?~
The Mensetsu ~Naitei Hoshikerya Wakaru Daro?~
8%
Tags
  • Casting Couch
  • Rape by Deception
  • Manager Protagonist
  • Office
  • Ending Scene Recollection
Rating 5.4071 Users

Onii-chan Asobo 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 (17 total)

NameScoreImportanceWeight
Design Story2.502.576.43
Brother/Sister Incest3.002.056.14
Protagonist's Younger Sister as a Heroine3.001.885.63
Brother/Sister Romance2.501.934.81
Lots of Event CGs2.501.794.47
Single Ending3.001.384.14
Cousin Incest2.002.014.02
Under the Same Roof3.001.273.82
Protagonist's Cousin as a Heroine2.001.883.77
Heroine with Zettai Ryouiki2.501.403.49
Brocon Heroine2.001.613.23
Brief NVL Scenes2.001.573.15
Slice of Life2.001.573.14
Maid Heroine2.001.533.07
Adult Protagonist2.501.032.57
Male Protagonist2.500.300.76
ADV2.500.150.36

Traits (69 total)

NameCharactersImportanceWeight
Writer Role22.372.60
Cousin Role31.872.60
Heart Shaped Cutout Subject of (Sexual)13.232.24
Mutual Masturbation Engages in (Sexual)21.942.13
Filming Engages in13.032.10
Video Game Developer Role12.962.05
Incest Engages in (Sexual)31.472.03
Filming Subject of12.871.99
Seduction Subject of12.671.85
Penile Masturbation Engages in (Sexual)12.471.71
Shop Clerk Role12.431.68
Medium Breasts Body21.521.67
Group Sex of One Male and Several Females Engages in (Sexual)31.171.63
Facesitting Subject of (Sexual)12.351.63
Obedient Personality12.291.59
Masturbation Engages in (Sexual)21.391.53
Lesbian Sex Engages in (Sexual)21.381.51
Seduction Engages in12.181.51
Flustered Personality12.131.47
Brother Complex Personality12.061.43
Kemonomimi Headband Clothes12.041.41
Voyeurism Subject of11.961.36
Full Brother Role11.951.35
Bisexual Role11.951.35
Assertive Personality11.941.34
Cardigan Clothes11.871.30
Twin Braids Hair11.861.29
Homosexual Role11.831.27
Hidden Eyes11.811.25
Eye Covering Hair11.801.25
Handjob Subject of (Sexual)11.751.22
Older Brother Role11.731.20
Mischievous Personality11.731.20
Vaginal Masturbation Engages in (Sexual)11.701.18
Carefree Personality11.681.16
No Bangs Hair11.661.15
Garnet Eyes11.661.15
Maid's Headdress Clothes11.631.13
Vaginal Fingering Engages in (Sexual)11.621.12
Full Sister Role11.571.09
Kimono Clothes11.561.08
Cunnilingus Engages in (Sexual)11.551.08
Blowjob Subject of (Sexual)11.521.06
Maid's Dress Clothes11.511.05
Choker Clothes11.501.04
Younger Sister Role11.441.00
Tank Top Clothes11.420.98
Hairpin Clothes11.400.97
Curtained Hair11.300.90
Young-adult Body20.760.84
Violet Hair11.190.83
Cunnilingus Subject of (Sexual)11.160.81
Handjob Engages in (Sexual)11.160.80
Slim Body30.580.80
Vaginal Fingering Subject of (Sexual)11.080.75
Miniskirt Clothes11.060.74
Thigh-high Stockings Clothes11.040.72
Spiky Bangs Hair11.000.69
Sidehair Hair10.980.68
Shoulder-length Hair10.920.64
Virgin Sex Engages in (Sexual)10.850.59
Waist Length+ Hair10.810.56
Black Hair10.810.56
Blue Eyes10.800.56
Blowjob Engages in (Sexual)10.760.53
Pale Body30.370.51
Brown Hair10.680.47
Teen Body10.620.43
Short Hair10.610.42