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Summary

Seiya and Yukine finally start to go out after being friends since childhood. While they were shy about it first and had their doubts, their relationship quickly turned into a passionate one and led them explore their sexuality to the fullest... Which even included Amane, older sister of Yukine later on... Custom Sister ~Orechin no Iinari~ allows you to customize Yukine's appearance before you start the game.

Papa, Dakishimete Ageru ~Babumi na Manamusume no Bosei ni Amaete Nakadashi Zanmai~
Papa, Dakishimete Ageru ~Babumi na Manamusume no Bosei ni Amaete Nakadashi Zanmai~
NAN%
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
Ookami Shoujo to Issho Christmas Special Edition
Ookami Shoujo to Issho Christmas Special Edition
NAN%
Tags
  • Anime-looking 3D
  • Werewolf Heroine
  • Sexual Cosplay
  • Doggirl Heroine
  • Realtime 3D
Rating 6.9179 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
Boku, Mou Dechau! ~Moteasobareta Sausage~
Boku, Mou Dechau! ~Moteasobareta Sausage~
NAN%
Tags
  • Pedophile Protagonist
  • Shotacon Protagonist
  • Incest
  • Shotacon
  • Gay Shotacon
Rating 6.6522 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
xx na Kanojo no Tsukurikata
xx na Kanojo no Tsukurikata
NAN%
Tags
  • Customization
  • Dating Simulation
  • Skippable Gameplay
  • Transfer Student Protagonist
  • Deities
Rating 7.0313 Users
Ore no Sefure wa Otoko no Ko
Ore no Sefure wa Otoko no Ko
NAN%
Tags
  • Trap Heroine
  • Male on Trap
  • Flat Tints Only
  • Male on Male Sex Only
  • Portrait Orientation
Rating 6.0120 Users
Re:Rem Plus
Re:Rem Plus
NAN%
Tags
  • Heroine with Eye Covering Hairstyle
  • Butler Protagonist
  • Ejaculation Choice
  • Maid Heroine
  • Co-worker Heroine
Rating 6.6012 Users
Miai Kekkon Shita Osanazuma ga Otoko no Ko Datta Ken
Miai Kekkon Shita Osanazuma ga Otoko no Ko Datta Ken
NAN%
Tags
  • Only Trap Heroines
  • Male Pregnancy
  • Hero with Beauty Mark
  • Arranged Marriage
  • Protagonist's Wife as a Heroine
Rating 5.8023 Users
Aerial Life
Aerial Life
NAN%
Tags
  • Gaming
  • Confinement in a Simulated Reality
  • Virtual Reality
  • Gamer Heroine
  • Protagonist's Kouhai as a Heroine
Rating 6.2923 Users
Tonari no Seki no Gyaru Bitch ~Boku wa Kanojo no Sexfriend!?~
Tonari no Seki no Gyaru Bitch ~Boku wa Kanojo no Sexfriend!?~
NAN%
Tags
  • Skin Color Selection
  • Otaku Protagonist
  • Customization
  • Gyaru Heroine
  • Long Sexual Scenes
Rating 6.4527 Users
Oreimo Plus
Oreimo Plus
NAN%
Tags
  • Protagonist's Younger Sister as a Heroine
  • Protagonist's Full Sister as a Heroine
  • Imouto-type Heroine
  • Heroine with Flat Chest (Non-Loli)
  • Blood-related Brother/Sister Incest
Rating 6.1295 Users
Yankatsu! ~Yandere Futago to Hone no Zui made Icharabu Seikatsu Suru Hibi~
Yankatsu! ~Yandere Futago to Hone no Zui made Icharabu Seikatsu Suru Hibi~
NAN%
Tags
  • Shimaidon with Twins Ending
  • Shimaidon Ending
  • Balls Sucking
  • Yandere Heroine
  • Tribadism on Penis
Rating 5.8323 Users
Aniki Shikkaku!? Imouto-tachi to Ikenai Koto ni Nattemasu.
Aniki Shikkaku!? Imouto-tachi to Ikenai Koto ni Nattemasu.
NAN%
Tags
  • Brother/Sister Incest
  • Protagonist's Full Sister as a Heroine
  • Incest
  • Tribadism on Penis
  • Sexual Devices
Rating 6.5912 Users
Shindan no Kekka, Sore wa Koi no Yamai Desu
Shindan no Kekka, Sore wa Koi no Yamai Desu
NAN%
Tags
  • Medical Doctor Heroine
  • Genre Savvy Protagonist
  • Protagonist's Non-blood-related Sister as a Heroine
  • Nurse Heroine
  • Spring
Rating 6.6922 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~
NAN%
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
Iegami Nyoubou ~Nanashi Nekomata wa KamiTuber~
Iegami Nyoubou ~Nanashi Nekomata wa KamiTuber~
NAN%
Tags
  • Lazy Heroine
  • Catgirl Heroine
  • Tailjob
  • Armpit Sex
  • Heroine with Kimono
Rating 6.8825 Users
Puru Moe Angel Idol Aiko
Puru Moe Angel Idol Aiko
NAN%
Tags
  • Shotacon Protagonist
  • Only Uke Heroes
  • Male on Trap
  • Seme Protagonist
  • Only Trap Heroines
Rating 6.8136 Users
Juicy Imouto☆Hentai Pakorikkusu ~Mezase! Motekawa H na Onna no Ko♪~
Juicy Imouto☆Hentai Pakorikkusu ~Mezase! Motekawa H na Onna no Ko♪~
NAN%
Tags
  • Ugly Protagonist
  • Blood-related Brother/Sister Incest
  • Protagonist's Sister as a Heroine
  • Only Blood-related Heroines
  • Only Protagonist's Sisters as Heroine(s)
Rating 6.2318 Users
Otoko no Ko Datte Dekiru mon! ~Wonderful Haramase Life~
Otoko no Ko Datte Dekiru mon! ~Wonderful Haramase Life~
NAN%
Tags
  • Shotacon Protagonist
  • Only Shota Heroes
  • Male on Trap
  • Seme Protagonist
  • Gay Shotacon
Rating 6.3726 Users
Fuu☆Gaku ~Hisshuu Kamoku wa Sei Jitsugi! H na Jugyou de One Two Step~
Fuu☆Gaku ~Hisshuu Kamoku wa Sei Jitsugi! H na Jugyou de One Two Step~
NAN%
Tags
  • Triple Blowjob
  • Twin Handjob
  • Dildos
  • Reverse Missionary
  • White Haired Heroine
Rating 6.5913 Users
Watashi no Omoi ~Aijou to In
Watashi no Omoi ~Aijou to In'en to~
NAN%
Tags
  • Protagonist with Big Breasts
  • Infidelity
  • Oyakodon Ending
  • Blood-related Mother/Daughter Incest
  • Mother Support Character
Rating 6.1314 Users
Natsu no Osananajimi to, Fuyu no Kanojo
Natsu no Osananajimi to, Fuyu no Kanojo
NAN%
Tags
  • Student-Teacher Romance
  • Siscon Protagonist
  • Cousin Incest
  • Half-Japanese Heroine
  • Foreigner Heroine
Rating 7.0028 Users
Yan Moe Futago Shimai ~Yande Harande Ai Sarete...~
Yan Moe Futago Shimai ~Yande Harande Ai Sarete...~
NAN%
Tags
  • Heroine with Baby Complex
  • Shimaidon with Twins Ending
  • Shimaidon Ending
  • Twin Sisters as Heroines
  • Yandere Heroine
Rating 6.4640 Users
Siscon -Saiminjutsushi Onii-chan to Namaiki na Imouto-
Siscon -Saiminjutsushi Onii-chan to Namaiki na Imouto-
38%
Tags
  • Brother/Sister Incest
  • Chuunibyou Protagonist
  • Only Blood-related Heroines
  • Siscon Protagonist
  • Only Protagonist's Sisters as Heroine(s)
Rating 6.3022 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
38%
Tags
  • Only Uke Heroes
  • Shotacon Protagonist
  • Male on Trap
  • Seme Protagonist
  • Brother/Brother Incest
Rating 6.3024 Users
Aniki Shikkaku!? Imouto-tachi to Ikenai Koto ni Nattemasu.
Aniki Shikkaku!? Imouto-tachi to Ikenai Koto ni Nattemasu.
36%
Tags
  • Brother/Sister Incest
  • Protagonist's Full Sister as a Heroine
  • Incest
  • Tribadism on Penis
  • Sexual Devices
Rating 6.5912 Users
Yankatsu! ~Yandere Futago to Hone no Zui made Icharabu Seikatsu Suru Hibi~
Yankatsu! ~Yandere Futago to Hone no Zui made Icharabu Seikatsu Suru Hibi~
33%
Tags
  • Shimaidon with Twins Ending
  • Shimaidon Ending
  • Balls Sucking
  • Yandere Heroine
  • Tribadism on Penis
Rating 5.8323 Users
Oreimo Plus
Oreimo Plus
31%
Tags
  • Protagonist's Younger Sister as a Heroine
  • Protagonist's Full Sister as a Heroine
  • Imouto-type Heroine
  • Heroine with Flat Chest (Non-Loli)
  • Blood-related Brother/Sister Incest
Rating 6.1295 Users
Aerial Life
Aerial Life
31%
Tags
  • Gaming
  • Confinement in a Simulated Reality
  • Virtual Reality
  • Gamer Heroine
  • Protagonist's Kouhai as a Heroine
Rating 6.2923 Users
Tonari no Seki no Gyaru Bitch ~Boku wa Kanojo no Sexfriend!?~
Tonari no Seki no Gyaru Bitch ~Boku wa Kanojo no Sexfriend!?~
28%
Tags
  • Skin Color Selection
  • Otaku Protagonist
  • Customization
  • Gyaru Heroine
  • Long Sexual Scenes
Rating 6.4527 Users
Re:Rem Plus
Re:Rem Plus
27%
Tags
  • Heroine with Eye Covering Hairstyle
  • Butler Protagonist
  • Ejaculation Choice
  • Maid Heroine
  • Co-worker Heroine
Rating 6.6012 Users
Miai Kekkon Shita Osanazuma ga Otoko no Ko Datta Ken
Miai Kekkon Shita Osanazuma ga Otoko no Ko Datta Ken
26%
Tags
  • Only Trap Heroines
  • Male Pregnancy
  • Hero with Beauty Mark
  • Arranged Marriage
  • Protagonist's Wife as a Heroine
Rating 5.8023 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~
26%
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
Puru Moe Angel Idol Aiko
Puru Moe Angel Idol Aiko
26%
Tags
  • Shotacon Protagonist
  • Only Uke Heroes
  • Male on Trap
  • Seme Protagonist
  • Only Trap Heroines
Rating 6.8136 Users
Otoko no Ko Datte Dekiru mon! ~Wonderful Haramase Life~
Otoko no Ko Datte Dekiru mon! ~Wonderful Haramase Life~
26%
Tags
  • Shotacon Protagonist
  • Only Shota Heroes
  • Male on Trap
  • Seme Protagonist
  • Gay Shotacon
Rating 6.3726 Users
Watashi no Omoi ~Aijou to In
Watashi no Omoi ~Aijou to In'en to~
25%
Tags
  • Protagonist with Big Breasts
  • Infidelity
  • Oyakodon Ending
  • Blood-related Mother/Daughter Incest
  • Mother Support Character
Rating 6.1314 Users
Yan Moe Futago Shimai ~Yande Harande Ai Sarete...~
Yan Moe Futago Shimai ~Yande Harande Ai Sarete...~
24%
Tags
  • Heroine with Baby Complex
  • Shimaidon with Twins Ending
  • Shimaidon Ending
  • Twin Sisters as Heroines
  • Yandere Heroine
Rating 6.4640 Users
Natsuiro Sagittarius Gaiden Ayato-kyun no Otoko no Ko Nikki
Natsuiro Sagittarius Gaiden Ayato-kyun no Otoko no Ko Nikki
24%
Tags
  • Male on Trap
  • Seme Protagonist
  • Only Trap Heroines
  • Trap Support Character
  • Trap Heroine
Rating 6.8033 Users
Ane☆Hara-mix 2
Ane☆Hara-mix 2
23%
Tags
  • Shinigami Heroine
  • Succubus Heroine
  • Inbreeding
  • Non-blood-related Brother/Sister Incest
  • Impregnation
Rating 6.7424 Users
Otoko no Ko Gakuen! ~3nin no Otoko no Ko-tachi to no Unmei no Deai, Soshite Boku-tachi wa Koi ni Ochiru!~
Otoko no Ko Gakuen! ~3nin no Otoko no Ko-tachi to no Unmei no Deai, Soshite Boku-tachi wa Koi ni Ochiru!~
23%
Tags
  • Only Trap Heroines
  • Trap on Male
  • Trap Heroine
  • Student Hero
  • Male on Male Sex
Rating 6.2521 Users
Injutsu Saimin Kan ~Koi no Shikijou Uranai~
Injutsu Saimin Kan ~Koi no Shikijou Uranai~
22%
Tags
  • Erotic Mind Control
  • Quickie
  • Mind Control
  • Humping
  • Heroine with Zettai Ryouiki
Rating 5.8613 Users
Maou-sama wa Otoko no Ko!
Maou-sama wa Otoko no Ko!
22%
Tags
  • Maou Hero
  • Trap Support Character
  • Male on Trap
  • Seme Protagonist
  • Only Trap Heroines
Rating 6.7618 Users
WAS ~Lepidoptera no Sunadokei~
WAS ~Lepidoptera no Sunadokei~
22%
Tags
  • Personal Armed Combat
  • Church
  • Protagonist with Partial Voice Acting
  • Dystopia
  • Fighting Heroine
Rating 6.3556 Users
Yarichin no Ore ga Onna ni Nattara Yariman Datta Ken
Yarichin no Ore ga Onna ni Nattara Yariman Datta Ken
22%
Tags
  • Prostitute Protagonist
  • School Nurse Support Character
  • Genderbent Sex
  • Sex Change
  • Prostitution
Rating 5.8718 Users
Harem Mate
Harem Mate
22%
Tags
  • Bust Size Selection
  • Realtime 3D
  • Customization
  • Free Camera
  • Manager Protagonist
Rating 5.9527 Users
Oni Chichi After ~Nure Suke Airi to Amayadori Hen~
Oni Chichi After ~Nure Suke Airi to Amayadori Hen~
22%
Tags
  • Non-blood-related Father/Daughter Incest
  • Only Protagonist's Relatives as Heroine(s)
  • Rain
  • Half-Japanese Heroine
  • Only Younger Heroines
Rating 6.0422 Users
Tenmon Dokei no Aria
Tenmon Dokei no Aria
22%
Tags
  • Ghost Heroine
  • Non-human Heroine
  • White Haired Heroine
  • Drama
  • Single Ending
Rating 6.9022 Users

Custom☆Sister ~Ore Chin no Iinari~ 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 (20 total)

NameScoreImportanceWeight
Customization2.832.176.13
Modern Tsundere Heroine2.801.754.91
Fictional Modern Day Japanese Town2.251.954.40
Heroine with Zettai Ryouiki3.001.394.18
Single Ending3.001.384.13
Protagonist's Childhood Friend as a Heroine3.001.143.42
Protagonist in Relationship2.001.442.89
High Sexual Content2.671.052.81
Few Choices2.001.332.66
Student Protagonist2.001.262.52
Romance2.670.902.39
Student Heroine2.000.991.99
Nukige3.000.651.95
Missionary Position2.000.941.88
Doggy Style2.000.801.61
Infidelity1.001.501.50
Group Sex of One Male and Several Females1.500.921.37
Defloration1.000.760.76
Male Protagonist2.500.300.75
ADV2.600.140.37

Traits (12 total)

NameCharactersImportanceWeight
Customizable Appearance Role12.751.91
Childhood Friend Role21.261.38
Older Sister Role11.561.08
Younger Sister Role11.441.00
Parted in Middle Hair11.250.87
Red Eyes11.200.83
Blue Hair11.190.83
Teen Body20.620.68
Slim Body20.580.63
Waist Length+ Hair10.810.56
School Uniform Clothes10.750.52
Pale Body20.370.40