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Summary

The protagonist is currently living together with his older sister and going to prep school everyday. He likes her but is unable to be honest about his feelings. One day, he comes home early and see his sister masturbating while sniffing his shorts. At the height of his arousal, he unintentionally has sex with her. After doing the deed and being questioned if she likes him, his sister denies it on the ground that she only likes his scent. While disappointed at her words, he is delighted to know that from now on, he can make her do anything using his smell. [Translated from Official Site]

Deisui Sasereba Rakushou Sex ~Oba to Itoko Hen~
Deisui Sasereba Rakushou Sex ~Oba to Itoko Hen~
NAN%
Tags
  • Protagonist's Aunt as a Heroine
  • Drunk Sex
  • Aunt/Nephew Incest
  • Blood-related Aunt/Nephew Incest
  • Protagonist's Cousin as a Heroine
Rating 6.6659 Users
Senpai no Oku-san ni Yuuwaku Sarete, Mi mo Kokoro mo Netoru Hanashi
Senpai no Oku-san ni Yuuwaku Sarete, Mi mo Kokoro mo Netoru Hanashi
NAN%
Tags
  • Voiced Thoughts
  • Pregnancy Good Ending
  • Only One Bad Ending
  • Infidelity
  • Highly Animated Sprites
Rating 6.7847 Users
Neko no Onee-chan ga Oshiete Kureta Koto
Neko no Onee-chan ga Oshiete Kureta Koto
NAN%
Tags
  • Shotacon
  • Catgirl Heroine
  • Shota Protagonist
  • Straight Shotacon
  • Skin Color Selection
Rating 6.8524 Users
Yokkyuu Fuman na Boku no Mama no Sex Lesson ~Papa ni wa Ienai Katei-nai Jouji~
Yokkyuu Fuman na Boku no Mama no Sex Lesson ~Papa ni wa Ienai Katei-nai Jouji~
NAN%
Tags
  • Quickie
  • Only Blood-related Heroines
  • Only Older Heroines
  • Blood-related Mother/Son Incest
  • Only Non-Virgin Heroines
Rating 6.1344 Users
Itsu made mo Musuko no Mama ja Irarenai! 6 ~Kyonyuu de Cool na Kaa-san no Oppai ni Dakare nagara Tappuri Amaetai!~
Itsu made mo Musuko no Mama ja Irarenai! 6 ~Kyonyuu de Cool na Kaa-san no Oppai ni Dakare nagara Tappuri Amaetai!~
NAN%
Tags
  • Obacon
  • Protagonist's Blood-related Mother as a Heroine
  • Mother/Son Romance
  • Blood-related Mother/Son Incest
  • Anal Plug Tail
Rating 7.37178 Users
Mesu Ochi! Kyonyuuzuma to no Iyasare Love Onsen ~Kyonyuuzuma-tachi to Mi mo Kokoro mo Fureau Love Ero Seikatsu~
Mesu Ochi! Kyonyuuzuma to no Iyasare Love Onsen ~Kyonyuuzuma-tachi to Mi mo Kokoro mo Fureau Love Ero Seikatsu~
NAN%
Tags
  • Ryokan
  • Heroine with Pubic Hair
  • Netori
  • Nursing Handjob
  • Onsen
Rating 7.4799 Users
Bosei Kanojo 2 -Chisei Houkai Hen-
Bosei Kanojo 2 -Chisei Houkai Hen-
NAN%
Tags
  • Cousin Incest
  • Protagonist's Cousin as a Heroine
  • Pure Love Story
  • Only Protagonist's Relatives as Heroine(s)
  • Domicile
Rating 7.2244 Users
Binyuu Kiss Nee Rimi "Otouto no Kuse ni Sakarau Nante... Namaiki yo!"
Binyuu Kiss Nee Rimi "Otouto no Kuse ni Sakarau Nante... Namaiki yo!"
NAN%
Tags
  • Oneesan-type Heroine
  • Blood-related Aunt/Nephew Incest
  • Incest Romance
  • Kissing Scene
  • Armpit Sex
Rating 7.3122 Users
Kyonyuu de Ecchi na Onee-chan-tachi ga Boku no Chi*po o 24-jikan Hanashite Kurenai!
Kyonyuu de Ecchi na Onee-chan-tachi ga Boku no Chi*po o 24-jikan Hanashite Kurenai!
NAN%
Tags
  • Defloration During Common Route
  • Only Protagonist's Sisters as Heroine(s)
  • Long Sexual Scenes
  • Protagonist's Full Sister as a Heroine
  • Triple Boobjob
Rating 6.7035 Users
Sispaco ~H na Amakara 4 Shimai~
Sispaco ~H na Amakara 4 Shimai~
NAN%
Tags
  • Protagonist's Older Sister as a Heroine
  • Single Legjob
  • Non-blood-related Sister/Sister Incest
  • Heroine with Gigantic Breasts
  • Brother/Sister Romance
Rating 6.8751 Users
Kakeochi
Kakeochi
NAN%
Tags
  • Heroine with a Sundress
  • Pure Love Story
  • Reunion
  • Protagonist's Childhood Friend as a Heroine
  • Single Handjob
Rating 6.0020 Users
Nee, Amaete! ~Futari no Ane to Mi mo Kokoro mo Torokeru Seikatsu~
Nee, Amaete! ~Futari no Ane to Mi mo Kokoro mo Torokeru Seikatsu~
NAN%
Tags
  • Shimaidon Ending
  • Chosen Choices Marking
  • Brocon Heroine
  • Twin Handjob
  • Protagonist's Blood-related Sister as a Heroine
Rating 6.9423 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
Nee x Nee! Docchi ga Suki? Docchi mo!! ~Yasashii Onee-chan to Cool na Onee-chan ni Hasamarete Boku wa Mou!!~
Nee x Nee! Docchi ga Suki? Docchi mo!! ~Yasashii Onee-chan to Cool na Onee-chan ni Hasamarete Boku wa Mou!!~
NAN%
Tags
  • Obacon
  • Ear-Cleaning
  • Only Older Heroines
  • Reverse Trap Heroine
  • Only Protagonist's Sisters as Heroine(s)
Rating 7.3568 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
Joushi no Oku-san no Yokkyuu Fuman o Kaishou Sasete, Mi mo Kokoro mo Netoru Hanashi
Joushi no Oku-san no Yokkyuu Fuman o Kaishou Sasete, Mi mo Kokoro mo Netoru Hanashi
NAN%
Tags
  • Sex on a Beach
  • Heroine with Children
  • Highly Animated Sprites
  • Lip Sync
  • Love Hotel
Rating 6.5139 Users
Namepu!
Namepu!
NAN%
Tags
  • Single Legjob
  • Protagonist's Younger Sister as a Heroine
  • Protagonist's Full Sister as a Heroine
  • Kneepit Sex
  • Forbidden Love
Rating 7.2558 Users
Harem Mura ~Dousotsu Fukahi! Kodane Teikyou wa Mura no Okite Desu!!~
Harem Mura ~Dousotsu Fukahi! Kodane Teikyou wa Mura no Okite Desu!!~
NAN%
Tags
  • Birthrate Decline
  • Polygamy
  • Unavoidable Harem Ending
  • Polyamory
  • Sexual Slavery (Consensual)
Rating 6.6357 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~
NAN%
Tags
  • Only Younger Heroines
  • Only Blood-related Heroines
  • Discreet Phone Sex
  • Only Protagonist's Sisters as Heroine(s)
  • Single Buttjob
Rating 6.6835 Users
Mesu Ochi! Miwaku no Hitozuma Life ~Toshiuezuma-tachi to no Icha Love Shirudaku Seikatsu~
Mesu Ochi! Miwaku no Hitozuma Life ~Toshiuezuma-tachi to no Icha Love Shirudaku Seikatsu~
NAN%
Tags
  • Rounin Protagonist
  • In-law Incest
  • Protagonist's Sister-in-Law as a Heroine
  • Blood-related Aunt/Nephew Incest
  • Protagonist's Aunt as a Heroine
Rating 7.08114 Users
Hirusagari no Danchizuma 3 ~Otto ni wa Ienai Himitsu no Houmon Hanbai~
Hirusagari no Danchizuma 3 ~Otto ni wa Ienai Himitsu no Houmon Hanbai~
NAN%
Tags
  • Netori
  • Highly Animated Sprites
  • Sexual Devices
  • Naked Heroine with Apron
  • Condoms
Rating 6.6031 Users
Ikenai Kozukuri 5 ~Tonari ni Koshitekita Hitozuma to Ikenai Sex~
Ikenai Kozukuri 5 ~Tonari ni Koshitekita Hitozuma to Ikenai Sex~
NAN%
Tags
  • Ugly Protagonist
  • Chubby Protagonist
  • Apartment Building
  • Netori
  • Married Heroine
Rating 6.5732 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~
NAN%
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
Siskon
Siskon
NAN%
Tags
  • Brother/Sister Romance
  • Blood-related Brother/Sister Incest
  • Salaryman Protagonist
  • Childishly Violent Heroine
  • Childhood Promise
Rating 6.6029 Users
Oyako Ai 2
Oyako Ai 2
40%
Tags
  • Heroine with Baby Complex
  • Mother/Son Romance
  • Blood-related Mother/Son Incest
  • Protagonist's Blood-related Mother as a Heroine
  • Only Protagonist's Relatives as Heroine(s)
Rating 6.9176 Users
Hitozuma ni Natta Onee-san ~Manatsu no Omoide~
Hitozuma ni Natta Onee-san ~Manatsu no Omoide~
36%
Tags
  • Heroine with Jeans
  • Food Play
  • Ejaculation Forewarner
  • Heroine with Inverted Nipples
  • Mirror Sex
Rating 6.5927 Users
Nee x Nee! Docchi ga Suki? Docchi mo!! ~Yasashii Onee-chan to Cool na Onee-chan ni Hasamarete Boku wa Mou!!~
Nee x Nee! Docchi ga Suki? Docchi mo!! ~Yasashii Onee-chan to Cool na Onee-chan ni Hasamarete Boku wa Mou!!~
34%
Tags
  • Obacon
  • Ear-Cleaning
  • Only Older Heroines
  • Reverse Trap Heroine
  • Only Protagonist's Sisters as Heroine(s)
Rating 7.3568 Users
Bracon! Nazusa Onee-chan no Seikatsu Hogo
Bracon! Nazusa Onee-chan no Seikatsu Hogo
32%
Tags
  • School Nurse Heroine
  • Brocon Heroine
  • Blood-related Brother/Sister Incest
  • Only Blood-related Heroines
  • Only Older Heroines
Rating 6.7743 Users
Nee, Amaete! ~Futari no Ane to Mi mo Kokoro mo Torokeru Seikatsu~
Nee, Amaete! ~Futari no Ane to Mi mo Kokoro mo Torokeru Seikatsu~
31%
Tags
  • Shimaidon Ending
  • Chosen Choices Marking
  • Brocon Heroine
  • Twin Handjob
  • Protagonist's Blood-related Sister as a Heroine
Rating 6.9423 Users
Sispaco ~H na Amakara 4 Shimai~
Sispaco ~H na Amakara 4 Shimai~
31%
Tags
  • Protagonist's Older Sister as a Heroine
  • Single Legjob
  • Non-blood-related Sister/Sister Incest
  • Heroine with Gigantic Breasts
  • Brother/Sister Romance
Rating 6.8751 Users
Kakeochi
Kakeochi
30%
Tags
  • Heroine with a Sundress
  • Pure Love Story
  • Reunion
  • Protagonist's Childhood Friend as a Heroine
  • Single Handjob
Rating 6.0020 Users
Binyuu Kiss Nee Rimi "Otouto no Kuse ni Sakarau Nante... Namaiki yo!"
Binyuu Kiss Nee Rimi "Otouto no Kuse ni Sakarau Nante... Namaiki yo!"
30%
Tags
  • Oneesan-type Heroine
  • Blood-related Aunt/Nephew Incest
  • Incest Romance
  • Kissing Scene
  • Armpit Sex
Rating 7.3122 Users
Kyonyuu de Ecchi na Onee-chan-tachi ga Boku no Chi*po o 24-jikan Hanashite Kurenai!
Kyonyuu de Ecchi na Onee-chan-tachi ga Boku no Chi*po o 24-jikan Hanashite Kurenai!
30%
Tags
  • Defloration During Common Route
  • Only Protagonist's Sisters as Heroine(s)
  • Long Sexual Scenes
  • Protagonist's Full Sister as a Heroine
  • Triple Boobjob
Rating 6.7035 Users
Joushi no Oku-san no Yokkyuu Fuman o Kaishou Sasete, Mi mo Kokoro mo Netoru Hanashi
Joushi no Oku-san no Yokkyuu Fuman o Kaishou Sasete, Mi mo Kokoro mo Netoru Hanashi
30%
Tags
  • Sex on a Beach
  • Heroine with Children
  • Highly Animated Sprites
  • Lip Sync
  • Love Hotel
Rating 6.5139 Users
Harem Mura ~Dousotsu Fukahi! Kodane Teikyou wa Mura no Okite Desu!!~
Harem Mura ~Dousotsu Fukahi! Kodane Teikyou wa Mura no Okite Desu!!~
30%
Tags
  • Birthrate Decline
  • Polygamy
  • Unavoidable Harem Ending
  • Polyamory
  • Sexual Slavery (Consensual)
Rating 6.6357 Users
Mesu Ochi! Miwaku no Hitozuma Life ~Toshiuezuma-tachi to no Icha Love Shirudaku Seikatsu~
Mesu Ochi! Miwaku no Hitozuma Life ~Toshiuezuma-tachi to no Icha Love Shirudaku Seikatsu~
29%
Tags
  • Rounin Protagonist
  • In-law Incest
  • Protagonist's Sister-in-Law as a Heroine
  • Blood-related Aunt/Nephew Incest
  • Protagonist's Aunt as a Heroine
Rating 7.08114 Users
Ikenai Kozukuri 5 ~Tonari ni Koshitekita Hitozuma to Ikenai Sex~
Ikenai Kozukuri 5 ~Tonari ni Koshitekita Hitozuma to Ikenai Sex~
29%
Tags
  • Ugly Protagonist
  • Chubby Protagonist
  • Apartment Building
  • Netori
  • Married Heroine
Rating 6.5732 Users
Siskon
Siskon
29%
Tags
  • Brother/Sister Romance
  • Blood-related Brother/Sister Incest
  • Salaryman Protagonist
  • Childishly Violent Heroine
  • Childhood Promise
Rating 6.6029 Users
Oyako Ai ~Ikenai Kozukuri 2~
Oyako Ai ~Ikenai Kozukuri 2~
29%
Tags
  • Heroine with Baby Complex
  • Protagonist's Blood-related Daughter as a Heroine
  • Fathercon Heroine
  • Blood-related Father/Daughter Incest
  • No "Keep Voice on Click" Option
Rating 6.6270 Users
Tomodachi no Haha ~Jukujuku Taru Omoi~
Tomodachi no Haha ~Jukujuku Taru Omoi~
29%
Tags
  • Netori
  • Armpit Licking
  • Nursing Handjob
  • Only Older Heroines
  • Discreet Phone Sex
Rating 7.0555 Users
Itsu made mo Musuko no Mama ja Irarenai! 3 ~Kyonyuu de Muchimuchi na Kaa-san no Oppai o Sutte Monde Hasande Ippai Dashitai!~
Itsu made mo Musuko no Mama ja Irarenai! 3 ~Kyonyuu de Muchimuchi na Kaa-san no Oppai o Sutte Monde Hasande Ippai Dashitai!~
29%
Tags
  • Obacon
  • Mother/Son Romance
  • Mother/Son Incest
  • Incest Romance
  • Only Blood-related Heroines
Rating 7.24196 Users
Meimon Joshikou Ryokou ~Ore Dake Otoko Nandesu ga!?~
Meimon Joshikou Ryokou ~Ore Dake Otoko Nandesu ga!?~
28%
Tags
  • Trap Protagonist
  • Single Buttjob
  • All-girls School
  • Half-Japanese Heroine
  • Only Virgin Heroines
Rating 7.0724 Users
Onii-chan!! Shasei no Kanri wa Imouto ni Makasete!!
Onii-chan!! Shasei no Kanri wa Imouto ni Makasete!!
28%
Tags
  • Full Chastity Belt
  • Quadruple+ Blowjob
  • Clothed Female Naked Male
  • Protagonist's Sister as a Heroine
  • Cosplay
Rating 6.9730 Users
Boku One ~End of Summer Days After~
Boku One ~End of Summer Days After~
28%
Tags
  • Heroine with Baby Complex
  • Summer
  • Time Jump
  • Pillow Talk
  • Armpit Licking
Rating 7.2632 Users
Mama to no Ikisugi Ama Ama Seikatsu ~Ippai Kimochi Ii Koto Oshiete A-Ge-Ru~
Mama to no Ikisugi Ama Ama Seikatsu ~Ippai Kimochi Ii Koto Oshiete A-Ge-Ru~
28%
Tags
  • Protagonist's Blood-related Mother as a Heroine
  • Blood-related Mother/Son Incest
  • Inbreeding
  • Widow Heroine
  • Only Non-Virgin Heroines
Rating 6.2430 Users
Mesu Ochi! Ore no Netori-bou de Midara ni Aegu Senpai & Kouhai Tsuma 2 ~Mucchiri Nikuatsu no Kyonyuu Tsuma-tachi to no Icharabu Hame Seikatsu~
Mesu Ochi! Ore no Netori-bou de Midara ni Aegu Senpai & Kouhai Tsuma 2 ~Mucchiri Nikuatsu no Kyonyuu Tsuma-tachi to no Icharabu Hame Seikatsu~
28%
Tags
  • Co-worker Heroine
  • Protagonist's Boss as a Heroine
  • Masturbation with Object
  • Office Lady Heroine
  • Drunk Sex
Rating 7.5173 Users
Itsu made mo Musuko no Mama ja Irarenai! 2 ~Kyonyuu Kyoushi no Kaa-san ni Ie Demo Gakuen Demo Amaetai! Aa, Ii yo Kaa-san! Haa Haa, Sugoku Koufun Suru!~
Itsu made mo Musuko no Mama ja Irarenai! 2 ~Kyonyuu Kyoushi no Kaa-san ni Ie Demo Gakuen Demo Amaetai! Aa, Ii yo Kaa-san! Haa Haa, Sugoku Koufun Suru!~
27%
Tags
  • Obacon
  • Mother/Son Romance
  • High Amount of Special Effects
  • Incest Romance
  • Protagonist's Blood-related Mother as a Heroine
Rating 7.38231 Users
Succu Ari Apart
Succu Ari Apart
27%
Tags
  • Heroine with Gigantic Breasts
  • Voice Saving
  • Playtime Counter
  • Heroine with Inverted Nipples
  • Nursing Handjob
Rating 6.8333 Users

Ikenai Kozukuri 4 ~Namaiki na Aneki ga Jitsu wa Ore no Semen ga Daisuki Datta!?~ 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 (37 total)

NameScoreImportanceWeight
Rounin Protagonist2.002.905.80
Brother/Sister Romance2.501.934.81
Blood-related Brother/Sister Incest3.001.494.46
Only Blood-related Heroines2.002.104.21
Only Older Heroines2.002.104.19
Impregnation3.001.374.12
Brocon Heroine2.501.614.03
Sex on a Beach2.002.004.00
Only Protagonist's Sisters as Heroine(s)2.001.993.98
Inbreeding2.001.983.97
Classic Tsundere Heroine2.001.723.44
Adult Breast Feeding2.001.713.41
Piledriver2.001.593.18
Spoons2.001.492.98
Kissing Scene2.001.452.89
Vaginal Masturbation2.001.372.75
Under the Same Roof2.001.272.54
Lactation During Sex2.001.272.54
Vaginal Fingering2.001.262.53
Pregnant Sex2.001.182.35
Single Boobjob2.001.152.31
Only Virgin Heroines2.001.082.17
Standing Sex2.001.062.11
Sitting Sex2.001.062.11
Naked Sprites2.001.052.11
Protagonist's Sister as a Heroine1.002.092.09
Only a Single Heroine2.001.022.04
Outdoor Sex2.001.001.99
Single Blowjob2.000.971.93
Missionary Position2.000.941.88
Cowgirl2.000.841.68
Nukige2.500.651.63
Doggy Style2.000.801.61
Defloration2.000.761.52
Multiple Endings2.000.671.34
Male Protagonist3.000.300.91
ADV2.000.150.29

Traits (44 total)

NameCharactersImportanceWeight
Sling Bikini Clothes12.621.81
Catsuit Clothes12.611.81
Armpit Sex Engages in (Sexual)12.481.72
Childbirth Engages in12.481.72
Classic Tsundere Personality12.401.66
Adult Breast Feeding (obsolete) Engages in (Sexual)12.381.65
Inbreeding Engages in (Sexual)12.211.53
Waitstaff Uniform Clothes12.061.43
Cuffs Clothes12.031.41
Piledriver Subject of (Sexual)11.941.35
Over The Knee Socks Clothes11.941.35
Waitstaff Role11.821.26
Mature Personality11.811.26
Reverse Missionary Subject of (Sexual)11.731.20
Spoons Subject of (Sexual)11.671.16
Lactation Engages in11.591.10
Apron Clothes11.591.10
Full Sister Role11.571.09
Older Sister Role11.561.08
Pregnant Sex Engages in (Sexual)11.531.06
Choker Clothes11.501.04
Incest Engages in (Sexual)11.471.02
Blouse Clothes11.471.02
Black Eyes11.420.99
Pregnancy Subject of11.400.97
Masturbation Engages in (Sexual)11.390.96
Nipple Sucking Subject of (Sexual)11.380.96
Ahegao Engages in (Sexual)11.320.92
Ahoge Hair11.320.91
Watashi Personality11.260.87
Blue Hair11.190.83
Standing Sex Subject of (Sexual)11.180.82
Handjob Engages in (Sexual)11.160.80
Outdoor Sex Engages in (Sexual)11.160.80
Missionary Subject of (Sexual)11.120.77
Boobjob Engages in (Sexual)11.070.74
Miniskirt Clothes11.060.74
Sitting Sex Subject of (Sexual)11.060.74
Cowgirl Subject of (Sexual)10.950.66
Doggy Style Subject of (Sexual)10.930.64
Virgin Sex Engages in (Sexual)10.850.59
Waist Length+ Hair10.810.56
Black Hair10.810.56
Blowjob Engages in (Sexual)10.760.53