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Summary

Without asking for his opinion, the protagonist's father announces that he is going to remarry. As such, "Kousuke" has to suddenly live with his two new step sisters. Although the sisters have opposite personalities, they get along very well. Kana, the older sister, calls herself Kousuke's "onee-chan" despite being younger than him, and has a very sunny and mature disposition. Saya, the younger sister, hates men and does nothing but glare at Kousuke when he's around. While Kousuke is still confused about the sudden developments and change in his life, his father moves to a new house with his new wife only a month later. As a result, Kousuke has to take care of his sisters. Luckily, as the sisters get along well with each other, all Kousuke needs to do is do the housework and manage the money their parents send them. And so, their peaceful life together begins. A few weeks later, Kousuke wakes up in the same bed as Kana... [Translated from Getchu]

Futamata Yarou to Papakatsu Shimai
Futamata Yarou to Papakatsu Shimai
NAN%
Tags
  • Shimaidon with Twins
  • Twin Sisters as Heroines
  • Otaku Protagonist
  • Sex Involving Prostitution
  • Otaku Heroine
Rating 6.4623 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
Tonari no Sanshimai-san ga Totsuide Kimashita!?
Tonari no Sanshimai-san ga Totsuide Kimashita!?
NAN%
Tags
  • Shimaidon
  • Salaryman Protagonist
  • Non-twin Heroine Sisters
  • Healer Heroine
  • Heroine from a Different World
Rating 6.9424 Users
Adebana Sacrament -Seinaru Miwaza to Akuryoutsuki no Shoujo-tachi-
Adebana Sacrament -Seinaru Miwaza to Akuryoutsuki no Shoujo-tachi-
NAN%
Tags
  • Possession
  • Student-Teacher Romance
  • Bleep Censor
  • Demon Heroine
  • Student Council President Heroine
Rating 6.5722 Users
Hyoui Kanojo ~Tsukikano
Hyoui Kanojo ~Tsukikano
NAN%
Tags
  • Long Common Route
  • Heroine with Eye Covering Hairstyle
  • Office Lady Heroine
  • Molestation on Public Transport
  • Ghost Heroine
Rating 6.8229 Users
Chinkamo Twins 2! ~Natsu da! Umi da! Futago no Imouto Oppai Taiketsu da!~
Chinkamo Twins 2! ~Natsu da! Umi da! Futago no Imouto Oppai Taiketsu da!~
NAN%
Tags
  • Only Blood-related Heroines
  • Only Protagonist's Sisters as Heroine(s)
  • Unnamed Protagonist
  • Twin Footjob
  • Oppai Loli Heroine
Rating 6.3720 Users
Natsu Ecchi 2 ~Futago to Inaka no Natsuyasumi~
Natsu Ecchi 2 ~Futago to Inaka no Natsuyasumi~
NAN%
Tags
  • Blood-related Uncle/Niece Incest
  • Unnamed Protagonist
  • Protagonist's Niece as a Heroine
  • Oppai Loli Heroine
  • Sister/Sister Incest
Rating 5.4828 Users
Koi wa Mofumofu! Love Me Teddy
Koi wa Mofumofu! Love Me Teddy
NAN%
Tags
  • Shapeshifting
  • Yandere Heroine
  • Heroine with Tights
  • Otaku Heroine
  • Modern Tsundere Heroine
Rating 6.9624 Users
Mama Haha wa Musuko o Aishiteru! ~Okaa-san ni Amaete Ii no yo...Rinko Mama no Ecchi na Osewa Jijou~
Mama Haha wa Musuko o Aishiteru! ~Okaa-san ni Amaete Ii no yo...Rinko Mama no Ecchi na Osewa Jijou~
NAN%
Tags
  • Non-blood-related Mother/Son Incest
  • Widow Heroine
  • Mother/Son Romance
  • Incest Romance
  • Protagonist's Non-blood-related Mother as a Heroine
Rating 7.3744 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
Kanojo no Imouto no Kyonyuu Yuuwaku ~Onii-chan, Watashi to Ii Koto... Shimasho?~
Kanojo no Imouto no Kyonyuu Yuuwaku ~Onii-chan, Watashi to Ii Koto... Shimasho?~
NAN%
Tags
  • Reverse Netorare
  • Tutor Protagonist
  • Protagonist in Relationship
  • Promiscuous Heroine
  • Netori
Rating 6.1523 Users
Gyaru Shimai ~Harem Time ga Tomaranai!~
Gyaru Shimai ~Harem Time ga Tomaranai!~
NAN%
Tags
  • Skin Color Selection
  • Shimaidon
  • Gyaru Heroine
  • Non-twin Heroine Sisters
  • Twin Boobjob
Rating 6.5327 Users
Shimojimo no Seikatsu o Tashinamu Tame no Tsudoi ~Muchi de Kouki na Ojou-sama wa Shomin no Seikatsu ni Kyoumi Shinshin~
Shimojimo no Seikatsu o Tashinamu Tame no Tsudoi ~Muchi de Kouki na Ojou-sama wa Shomin no Seikatsu ni Kyoumi Shinshin~
NAN%
Tags
  • Foolish Protagonist
  • Stockings
  • No Common Sense Heroine
  • Ojousama Heroine
  • Nursing Handjob
Rating 7.3021 Users
Saimin Datsujo 3 ~Subete ga Boku no Jiyuu ni Naru Sekai e Youkoso~ Kurihara Shizuru Hen
Saimin Datsujo 3 ~Subete ga Boku no Jiyuu ni Naru Sekai e Youkoso~ Kurihara Shizuru Hen
NAN%
Tags
  • Shimaidon
  • Heroine in Relationship with Other(s)
  • Erotic Mind Control
  • Blood-related Sister/Sister Incest
  • Teacher Heroine
Rating 6.8853 Users
Ai Suru Tsuma wa, Kyou mo Hoka no Otoko ni Dakarete Iku ~ Taninbou de Midare Nikuyoku o Mitashite Iku Ore no Tsuma
Ai Suru Tsuma wa, Kyou mo Hoka no Otoko ni Dakarete Iku ~ Taninbou de Midare Nikuyoku o Mitashite Iku Ore no Tsuma
NAN%
Tags
  • Protagonist's Wife as a Heroine
  • Condoms
  • Heroine Having Sex with Others
  • Adult Heroine
  • Adult Protagonist
Rating 6.2720 Users
God Sisters
God Sisters
NAN%
Tags
  • Only Protagonist's Sisters as Heroine(s)
  • Protagonist's Non-blood-related Sister as a Heroine
  • Ejaculation Forewarner
  • Background Moans
  • Heroine with a Fang
Rating 6.6936 Users
Kamisama no Shippo ~Etogami-sama tachi no Ongaeshi~
Kamisama no Shippo ~Etogami-sama tachi no Ongaeshi~
NAN%
Tags
  • Kemonomimi
  • Mousegirl Heroine
  • Usamimi Heroine
  • Cowgirl Heroine
  • Kemonomimi Heroine
Rating 7.0145 Users
Oshino Ruka wa Iyashite Agetai
Oshino Ruka wa Iyashite Agetai
NAN%
Tags
  • Maid Heroine
  • Heroine with Wings
  • Unavoidable Harem Ending
  • Ejaculation Forewarner
  • Voiced Thoughts
Rating 7.1926 Users
shin-neko ~Saikai Shita Imouto to no Arata na Kankei~
shin-neko ~Saikai Shita Imouto to no Arata na Kankei~
NAN%
Tags
  • Straight Lolicon
  • Only Blood-related Heroines
  • Only Protagonist's Sisters as Heroine(s)
  • Only Younger Heroines
  • Only Loli Heroines
Rating 6.5030 Users
Suspicion - Giwaku no Sei -
Suspicion - Giwaku no Sei -
NAN%
Tags
  • Reverse Netorare
  • European Heroine
  • Protagonist's Girlfriend as a Heroine
  • Promiscuous Heroine
  • High School Student Protagonist
Rating 6.2522 Users
Anata ga Iru no ni Netorarechau ~Onna no Ko Doushi no Aida ni Watte Hairu Jogakuen Dansei Kyouin~
Anata ga Iru no ni Netorarechau ~Onna no Ko Doushi no Aida ni Watte Hairu Jogakuen Dansei Kyouin~
NAN%
Tags
  • Sexual Re-orientation
  • Lotion Play
  • Androphobic Heroine
  • Heroine with Eye Covering Hairstyle
  • Has Window Transparency Setting
Rating 7.1365 Users
Koe ni Koi Shite, Koikogare!
Koe ni Koi Shite, Koikogare!
NAN%
Tags
  • Twin Handjob
  • Adult Breast Feeding
  • Brocon Heroine
  • Threesome
  • Butterfly
Rating 6.6335 Users
H de Hajimeru Strategy! ~Cute Rare Keiei Fukkou Keikaku~
H de Hajimeru Strategy! ~Cute Rare Keiei Fukkou Keikaku~
NAN%
Tags
  • Non-twin Heroine Sisters
  • Shopkeeper Heroine
  • Kneepit Sex
  • Romancing a Family
  • Waitress Heroine
Rating 6.7720 Users
Haitoku no Kyousei Tanetsuke ~ Ai Suru Tsuma no Naka ni Sosogikomareru Hoka no Otoko no Seieki
Haitoku no Kyousei Tanetsuke ~ Ai Suru Tsuma no Naka ni Sosogikomareru Hoka no Otoko no Seieki
NAN%
Tags
  • Naked Dogeza
  • Sex in Front of an Audience
  • Protagonist's Wife as a Heroine
  • Only Non-Virgin Heroines
  • Facesitting
Rating 6.3828 Users
Onii-chan Chou Suki 99 Jikan Ecchi Shiyo!
Onii-chan Chou Suki 99 Jikan Ecchi Shiyo!
42%
Tags
  • Only Protagonist's Sisters as Heroine(s)
  • Brother/Sister Romance
  • Unnamed Protagonist
  • Protagonist's Younger Sister as a Heroine
  • Shimaidon with Twins Ending
Rating 7.2140 Users
Low na Imouto ni Succubus ga Toritsuita node Tanetsuke Yoyuu deshita.
Low na Imouto ni Succubus ga Toritsuita node Tanetsuke Yoyuu deshita.
41%
Tags
  • Possession
  • Succubus Heroine
  • Unlockable Sexual Content
  • Fake Choices
  • Protagonist's Younger Sister as a Heroine
Rating 6.5723 Users
Saimin Datsujo 3 ~Subete ga Boku no Jiyuu ni Naru Sekai e Youkoso~ Kurihara Shizuru Hen
Saimin Datsujo 3 ~Subete ga Boku no Jiyuu ni Naru Sekai e Youkoso~ Kurihara Shizuru Hen
36%
Tags
  • Shimaidon
  • Heroine in Relationship with Other(s)
  • Erotic Mind Control
  • Blood-related Sister/Sister Incest
  • Teacher Heroine
Rating 6.8853 Users
Shimojimo no Seikatsu o Tashinamu Tame no Tsudoi ~Muchi de Kouki na Ojou-sama wa Shomin no Seikatsu ni Kyoumi Shinshin~
Shimojimo no Seikatsu o Tashinamu Tame no Tsudoi ~Muchi de Kouki na Ojou-sama wa Shomin no Seikatsu ni Kyoumi Shinshin~
35%
Tags
  • Foolish Protagonist
  • Stockings
  • No Common Sense Heroine
  • Ojousama Heroine
  • Nursing Handjob
Rating 7.3021 Users
Gyaru Shimai ~Harem Time ga Tomaranai!~
Gyaru Shimai ~Harem Time ga Tomaranai!~
35%
Tags
  • Skin Color Selection
  • Shimaidon
  • Gyaru Heroine
  • Non-twin Heroine Sisters
  • Twin Boobjob
Rating 6.5327 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~
34%
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
Kanojo no Imouto no Kyonyuu Yuuwaku ~Onii-chan, Watashi to Ii Koto... Shimasho?~
Kanojo no Imouto no Kyonyuu Yuuwaku ~Onii-chan, Watashi to Ii Koto... Shimasho?~
34%
Tags
  • Reverse Netorare
  • Tutor Protagonist
  • Protagonist in Relationship
  • Promiscuous Heroine
  • Netori
Rating 6.1523 Users
Koi wa Mofumofu! Love Me Teddy
Koi wa Mofumofu! Love Me Teddy
33%
Tags
  • Shapeshifting
  • Yandere Heroine
  • Heroine with Tights
  • Otaku Heroine
  • Modern Tsundere Heroine
Rating 6.9624 Users
Mama Haha wa Musuko o Aishiteru! ~Okaa-san ni Amaete Ii no yo...Rinko Mama no Ecchi na Osewa Jijou~
Mama Haha wa Musuko o Aishiteru! ~Okaa-san ni Amaete Ii no yo...Rinko Mama no Ecchi na Osewa Jijou~
33%
Tags
  • Non-blood-related Mother/Son Incest
  • Widow Heroine
  • Mother/Son Romance
  • Incest Romance
  • Protagonist's Non-blood-related Mother as a Heroine
Rating 7.3744 Users
God Sisters
God Sisters
33%
Tags
  • Only Protagonist's Sisters as Heroine(s)
  • Protagonist's Non-blood-related Sister as a Heroine
  • Ejaculation Forewarner
  • Background Moans
  • Heroine with a Fang
Rating 6.6936 Users
Oshino Ruka wa Iyashite Agetai
Oshino Ruka wa Iyashite Agetai
31%
Tags
  • Maid Heroine
  • Heroine with Wings
  • Unavoidable Harem Ending
  • Ejaculation Forewarner
  • Voiced Thoughts
Rating 7.1926 Users
Suspicion - Giwaku no Sei -
Suspicion - Giwaku no Sei -
30%
Tags
  • Reverse Netorare
  • European Heroine
  • Protagonist's Girlfriend as a Heroine
  • Promiscuous Heroine
  • High School Student Protagonist
Rating 6.2522 Users
Koe ni Koi Shite, Koikogare!
Koe ni Koi Shite, Koikogare!
30%
Tags
  • Twin Handjob
  • Adult Breast Feeding
  • Brocon Heroine
  • Threesome
  • Butterfly
Rating 6.6335 Users
Haitoku no Kyousei Tanetsuke ~ Ai Suru Tsuma no Naka ni Sosogikomareru Hoka no Otoko no Seieki
Haitoku no Kyousei Tanetsuke ~ Ai Suru Tsuma no Naka ni Sosogikomareru Hoka no Otoko no Seieki
29%
Tags
  • Naked Dogeza
  • Sex in Front of an Audience
  • Protagonist's Wife as a Heroine
  • Only Non-Virgin Heroines
  • Facesitting
Rating 6.3828 Users
Otouto-kun Chou Suki 99 Jikan Amaenasai!
Otouto-kun Chou Suki 99 Jikan Amaenasai!
29%
Tags
  • Only Blood-related Heroines
  • Nursing Handjob
  • Armpit Sex
  • Single Footjob
  • Heroine with Glasses
Rating 6.6920 Users
Teakamamire no Danshi
Teakamamire no Danshi
29%
Tags
  • Japanese Idols
  • Idol Protagonist
  • Voiced Thoughts
  • Idol Heroine
  • Love Hotel
Rating 6.7225 Users
Kazoku wa (Ore Igai) Succubus Deshita ~ Futari no Ane to Haha to no Seikatsu de Seieki o Shiboritora Remasu ~
Kazoku wa (Ore Igai) Succubus Deshita ~ Futari no Ane to Haha to no Seikatsu de Seieki o Shiboritora Remasu ~
29%
Tags
  • Succubus Heroine
  • Non-blood-related Mother/Son Incest
  • Protagonist's Non-blood-related Mother as a Heroine
  • Only Protagonist's Relatives as Heroine(s)
  • Non-blood-related Brother/Sister Incest
Rating 7.0430 Users
Seisokei Futago Idol no Ura Jijou ~Ore Dake ga Shiru Midara na Futari~
Seisokei Futago Idol no Ura Jijou ~Ore Dake ga Shiru Midara na Futari~
29%
Tags
  • Shimaidon with Twins
  • Twin Sisters as Heroines
  • Idol Heroine
  • Unavoidable Harem Ending
  • Protagonist's Childhood Friend as a Heroine
Rating 7.0534 Users
Ane Tsumami ~Miwaku no Osananajimi Onee-san Hitozuma to no Mecha Ero Dousei LoveLife~
Ane Tsumami ~Miwaku no Osananajimi Onee-san Hitozuma to no Mecha Ero Dousei LoveLife~
28%
Tags
  • Blood-related Aunt/Nephew Incest
  • Protagonist's Aunt as a Heroine
  • Sex on a Beach
  • Highly Animated Sprites
  • Lip Sync
Rating 7.4657 Users
Imosapo! ~Genkin de Low na Kyonyuu Imouto ni, Oppai Momasete Moraimashita~
Imosapo! ~Genkin de Low na Kyonyuu Imouto ni, Oppai Momasete Moraimashita~
28%
Tags
  • Runaway Heroine
  • Protagonist's Younger Sister as a Heroine
  • Slice of Life Comedy
  • Protagonist's Full Sister as a Heroine
  • Clothed Boobjob
Rating 7.0931 Users
Yome no Imouto to H na Kankei ni Natte Yabai!?
Yome no Imouto to H na Kankei ni Natte Yabai!?
27%
Tags
  • Protagonist's Sister-in-Law as a Heroine
  • Salaryman Protagonist
  • In-law Incest
  • Used Condoms Exposition
  • Infidelity
Rating 6.9847 Users
Saimin Datsujo 4 ~Subete ga Boku no Jiyuu ni Naru Sekai e Youkoso~ Tennouji Karen Hen
Saimin Datsujo 4 ~Subete ga Boku no Jiyuu ni Naru Sekai e Youkoso~ Tennouji Karen Hen
27%
Tags
  • Erotic Mind Control
  • Idol Heroine
  • White Haired Heroine
  • Student Protagonist
  • Twin Tail Heroine
Rating 6.7641 Users
Yuuri to Marin wa Iyashite Agetai
Yuuri to Marin wa Iyashite Agetai
27%
Tags
  • Succubus Heroine
  • Ejaculation Forewarner
  • Harem Ending
  • Voiced Thoughts
  • Gyaru Heroine
Rating 7.1430 Users
Kairaku Ochi Suru Anezuma ~Otto no Tame ni Midara na Youkyuu ni Sakaraenai~
Kairaku Ochi Suru Anezuma ~Otto no Tame ni Midara na Youkyuu ni Sakaraenai~
27%
Tags
  • Heroine in Relationship with Other(s)
  • Completion Status Indicator
  • Only Blood-related Heroines
  • Only Older Heroines
  • Remote-controlled Vibrator
Rating 6.4932 Users

Ore to Nakayoshi Shimai no Inma na Himitsu ~Imouto ni Shinu hodo Kiraware Nagara Ane to Sex Suru Kimyou Doukyo Seikatsu~ 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 (33 total)

NameScoreImportanceWeight
Blood-related Sister/Sister Incest2.002.134.26
Completion Status Indicator2.002.134.26
Shimaidon Ending2.002.134.25
Tribadism on Penis2.001.873.73
Sex in a Vehicle2.001.793.58
Naked Heroine with Apron2.001.663.33
Condoms2.001.653.31
Sexual Blindfold2.001.533.05
Spoons2.001.492.98
Background Moans2.001.442.87
Vaginal Masturbation2.001.372.75
Sounds of Copulation2.001.292.58
Twin Blowjob2.001.292.58
Vaginal Fingering2.001.262.53
Single Handjob2.001.252.51
Lesbian Sex2.001.152.30
Sex in Public Places2.001.092.17
Sixty-nine2.001.072.14
Sitting Sex2.001.062.11
Naked Sprites2.001.052.11
Adult Protagonist2.001.032.05
Single Blowjob2.000.971.93
Gokkun1.001.921.92
Missionary Position2.000.941.88
Cunnilingus2.000.931.86
Group Sex of One Male and Several Females2.000.921.83
Heroine with Big Breasts2.000.851.71
Cowgirl2.000.841.68
Doggy Style2.000.801.61
Multiple Endings2.000.671.34
Sexual Content2.000.631.26
Male Protagonist2.000.300.61
ADV2.000.150.29

Traits (56 total)

NameCharactersImportanceWeight
Non-blood-related Incest Engages in (Sexual)32.162.99
Step Sister Role22.432.67
Voyeurism Engages in (Sexual)22.142.36
Tribadism Engages in (Sexual)22.122.33
Polyamory Engages in22.112.32
Domestic Partner Role22.082.29
Tribadism on Penis Engages in (Sexual)22.082.29
Step Brother Role12.731.89
Turtleneck Tank Top Clothes12.711.88
Misandrist Personality12.671.85
Middle Sister Role12.511.74
Full Sister Role21.571.72
Violet Hair31.191.66
Sex in Front of an Audience Engages in (Sexual)21.501.65
Penis Growth Subject of12.341.62
Incest Engages in (Sexual)21.471.61
Intercrural Sex Subject of (Sexual)12.281.58
Balls Sucking Engages in (Sexual)12.261.57
Lesbian Sex Engages in (Sexual)21.381.51
Seduction Engages in12.181.51
Condom Sex Engages in (Sexual)12.141.49
Sex in Public Places Engages in (Sexual)21.261.38
Naked Apron Clothes11.871.30
Group Sex of One Male and Several Females Engages in (Sexual)21.171.29
Mature Personality11.811.26
Hidden Eyes11.811.25
Eye Covering Hair11.801.25
Cheerful Personality11.741.21
Older Brother Role11.731.20
Reserved Personality11.721.19
Group Sex of One Female and Several Males Engages in (Sexual)11.701.18
Vaginal Masturbation Engages in (Sexual)11.701.18
Doggy Style Engages in (Sexual)11.691.17
Spoons Subject of (Sexual)11.671.16
Vaginal Fingering Engages in (Sexual)11.621.12
University Student Role11.591.10
Lactation Engages in11.591.10
Ore Personality11.581.09
Cowgirl Subject of (Sexual)20.951.05
Younger Sister Role11.441.00
Blunt Bangs Hair11.400.97
Bathroom Sex Engages in (Sexual)11.390.96
Waist Length+ Hair20.810.89
Dress Clothes11.250.87
Blowjob Engages in (Sexual)20.760.84
Handjob Engages in (Sexual)11.160.80
Big Breasts Body11.140.79
Twin Tails Hair11.130.78
Vaginal Fingering Subject of (Sexual)11.080.75
Miniskirt Clothes11.060.74
Sitting Sex Subject of (Sexual)11.060.74
Straight Hair10.950.66
Doggy Style Subject of (Sexual)10.930.64
Virgin Sex Engages in (Sexual)10.850.59
Slim Body10.580.40
Pale Body10.370.26