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Summary

This summer I was asked to watch after my twin nieces. One of the sisters, Mai, is interested in sex. As we are starting to get intimate I need to keep this a secret from her sister Satsuki.

Teakamamire no Danshi
Teakamamire no Danshi
NAN%
Tags
  • Japanese Idols
  • Idol Protagonist
  • Voiced Thoughts
  • Idol Heroine
  • Love Hotel
Rating 6.7225 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
Giiga ~Fanluge†Qliphoth~
Giiga ~Fanluge†Qliphoth~
NAN%
Tags
  • Student Council Member Protagonist
  • Student Council Member Heroine
  • Armpit Sex
  • Student Council President Heroine
  • Monster Rape
Rating 6.8536 Users
Gyaruko-chan to Shippori Onsen Ryokou ~H Shimakuri Sanpaku Yokka no Tabi~
Gyaruko-chan to Shippori Onsen Ryokou ~H Shimakuri Sanpaku Yokka no Tabi~
NAN%
Tags
  • Onsen
  • Gyaru Heroine
  • Oyaji Protagonist
  • Only Non-Virgin Heroines
  • Prostitute Heroine
Rating 6.8026 Users
Oshino Ruka wa Iyashite Agetai
Oshino Ruka wa Iyashite Agetai
NAN%
Tags
  • Maid Heroine
  • Heroine with Wings
  • Ejaculation Forewarner
  • Unavoidable Harem Ending
  • Voiced Thoughts
Rating 7.1926 Users
Mazomai ~M na Imouto no Ecchi na Onedari~
Mazomai ~M na Imouto no Ecchi na Onedari~
NAN%
Tags
  • Only Protagonist's Sisters as Heroine(s)
  • Harem Ending with Theme
  • Homemaker Protagonist
  • Naizuri
  • Narrating Others' Thoughts
Rating 6.8937 Users
Low Rise!!!
Low Rise!!!
NAN%
Tags
  • Oppai Loli Heroine
  • Idol Heroine
  • Manager Protagonist
  • Japanese Idols
  • Straight Lolicon
Rating 6.7532 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
Ero Imo Hurricane! ~Idol no Imouto ga Erokute Erokute Ore no Risei ni Arashi no Yokan!?~
Ero Imo Hurricane! ~Idol no Imouto ga Erokute Erokute Ore no Risei ni Arashi no Yokan!?~
NAN%
Tags
  • Family Life Comedy
  • Live Sexual Broadcast
  • Bisexual Heroine
  • Only Younger Heroines
  • Protagonist's Full Sister as a Heroine
Rating 6.3839 Users
Teakamamire no Fukushuu
Teakamamire no Fukushuu
NAN%
Tags
  • Japanese Idols
  • Idol Heroine
  • Twin Blowjob
  • Heroine with Sexual Experience
  • Lesbian Sex
Rating 6.5423 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
Low na Imouto ni Succubus ga Toritsuita node Tanetsuke Yoyuu deshita.
Low na Imouto ni Succubus ga Toritsuita node Tanetsuke Yoyuu deshita.
NAN%
Tags
  • Possession
  • Succubus Heroine
  • Unlockable Sexual Content
  • Fake Choices
  • Protagonist's Younger Sister as a Heroine
Rating 6.5723 Users
Cute Resort ~Shiyou yo♥ Ecchi na Activity~
Cute Resort ~Shiyou yo♥ Ecchi na Activity~
NAN%
Tags
  • Resort
  • Crossover
  • Fully Consensual BDSM Only
  • Straight Shotacon
  • Twin Sister Support Character
Rating 6.5532 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
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
Nemureru Sono no Shoujo-tachi
Nemureru Sono no Shoujo-tachi
NAN%
Tags
  • Heroine with Crotchless Clothing
  • Panchira
  • Unlockable Hero(ine)
  • Pregnancy Ending
  • Succubus Heroine
Rating 6.8838 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
Himekoi * Sucreine!
Himekoi * Sucreine!
NAN%
Tags
  • Hime Heroine
  • Princess Heroine
  • Maid Support Character
  • Emotionless Heroine
  • Protagonist's Sister as a Support Character
Rating 6.8020 Users
Lollipop Factory
Lollipop Factory
NAN%
Tags
  • Sex Involving Food
  • Oppai Loli Heroine
  • Protagonist's Sister as a Support Character
  • Armpit Sex
  • Half-Japanese Heroine
Rating 6.8639 Users
Mousugu Natsuyasumi! 2
Mousugu Natsuyasumi! 2
NAN%
Tags
  • Straight Shotacon
  • Promiscuity
  • Child Protagonist
  • Transfer Student Heroine
  • Sex in a Classroom
Rating 6.1437 Users
Hime to Otome no Yakimochi LOVE
Hime to Otome no Yakimochi LOVE
NAN%
Tags
  • Former All-girls School
  • Student Council President Protagonist
  • Princess Heroine
  • Student Council Member Heroine
  • Varying Ending Songs
Rating 6.9737 Users
Asa Okitara Bishoujo ni Natteta Boku ni Onegai ga Arundatte? Shouganai nyaa.. Ii yo.
Asa Okitara Bishoujo ni Natteta Boku ni Onegai ga Arundatte? Shouganai nyaa.. Ii yo.
NAN%
Tags
  • Gender Bending
  • Genderbent Sex
  • Sex Change
  • Loli Protagonist
  • Sprite Viewer
Rating 6.5940 Users
Love Commu
Love Commu
NAN%
Tags
  • May-December Romance
  • Ojousama Heroine
  • Protagonist's Sister as a Support Character
  • All-girls School
  • Teacher Protagonist
Rating 7.3738 Users
Little Sick Girls ~Kagami no Naka no Idol~
Little Sick Girls ~Kagami no Naka no Idol~
NAN%
Tags
  • Chuunibyou Protagonist
  • Nympho Heroine
  • Kinetic Novel
  • Only a Single Heroine
  • Sexual Content
Rating 6.9334 Users
Ero Imo Cyclone! ~Uzumaku Eroero wa Imouto o Chuushin ni Kyuusoku Kakudaichuu!~
Ero Imo Cyclone! ~Uzumaku Eroero wa Imouto o Chuushin ni Kyuusoku Kakudaichuu!~
39%
Tags
  • Family Life Comedy
  • Unavoidable Harem Ending
  • Polyamory
  • Triple Footjob
  • Boke Heroine
Rating 6.8424 Users
Natsu Ecchi ~Mei to Inaka no Natsuyasumi~
Natsu Ecchi ~Mei to Inaka no Natsuyasumi~
38%
Tags
  • Blood-related Uncle/Niece Incest
  • Countryside
  • Protagonist's Niece as a Heroine
  • Summer
  • Straight Lolicon
Rating 5.9030 Users
Onii-chan, Migite no Shiyou o Kinshi Shimasu! 2
Onii-chan, Migite no Shiyou o Kinshi Shimasu! 2
36%
Tags
  • Siscon Protagonist
  • Beach
  • Only Protagonist's Sisters as Heroine(s)
  • Protagonist's Full Sister as a Heroine
  • Summer
Rating 5.9427 Users
Cute Resort ~Shiyou yo♥ Ecchi na Activity~
Cute Resort ~Shiyou yo♥ Ecchi na Activity~
35%
Tags
  • Resort
  • Crossover
  • Fully Consensual BDSM Only
  • Straight Shotacon
  • Twin Sister Support Character
Rating 6.5532 Users
Low na Imouto ni Succubus ga Toritsuita node Tanetsuke Yoyuu deshita.
Low na Imouto ni Succubus ga Toritsuita node Tanetsuke Yoyuu deshita.
33%
Tags
  • Possession
  • Succubus Heroine
  • Unlockable Sexual Content
  • Fake Choices
  • Protagonist's Younger Sister as a Heroine
Rating 6.5723 Users
Teakamamire no Fukushuu
Teakamamire no Fukushuu
33%
Tags
  • Japanese Idols
  • Idol Heroine
  • Twin Blowjob
  • Heroine with Sexual Experience
  • Lesbian Sex
Rating 6.5423 Users
Nyanto Suteki na Natsuiro Days
Nyanto Suteki na Natsuiro Days
32%
Tags
  • Resort
  • Brocon Support Character
  • Catgirl Heroine
  • Unavoidable Harem Ending
  • Protagonist's Sister as a Support Character
Rating 6.7927 Users
Koi wa Mofumofu! Love Me Teddy
Koi wa Mofumofu! Love Me Teddy
30%
Tags
  • Shapeshifting
  • Yandere Heroine
  • Heroine with Tights
  • Otaku Heroine
  • Modern Tsundere Heroine
Rating 6.9624 Users
Ero Imo Hurricane! ~Idol no Imouto ga Erokute Erokute Ore no Risei ni Arashi no Yokan!?~
Ero Imo Hurricane! ~Idol no Imouto ga Erokute Erokute Ore no Risei ni Arashi no Yokan!?~
29%
Tags
  • Family Life Comedy
  • Live Sexual Broadcast
  • Bisexual Heroine
  • Only Younger Heroines
  • Protagonist's Full Sister as a Heroine
Rating 6.3839 Users
Nemureru Sono no Shoujo-tachi
Nemureru Sono no Shoujo-tachi
28%
Tags
  • Heroine with Crotchless Clothing
  • Panchira
  • Unlockable Hero(ine)
  • Pregnancy Ending
  • Succubus Heroine
Rating 6.8838 Users
Himekoi * Sucreine!
Himekoi * Sucreine!
28%
Tags
  • Hime Heroine
  • Princess Heroine
  • Maid Support Character
  • Emotionless Heroine
  • Protagonist's Sister as a Support Character
Rating 6.8020 Users
Mousugu Natsuyasumi! 2
Mousugu Natsuyasumi! 2
28%
Tags
  • Straight Shotacon
  • Promiscuity
  • Child Protagonist
  • Transfer Student Heroine
  • Sex in a Classroom
Rating 6.1437 Users
Asa Okitara Bishoujo ni Natteta Boku ni Onegai ga Arundatte? Shouganai nyaa.. Ii yo.
Asa Okitara Bishoujo ni Natteta Boku ni Onegai ga Arundatte? Shouganai nyaa.. Ii yo.
28%
Tags
  • Gender Bending
  • Genderbent Sex
  • Sex Change
  • Loli Protagonist
  • Sprite Viewer
Rating 6.5940 Users
Little Sick Girls ~Kagami no Naka no Idol~
Little Sick Girls ~Kagami no Naka no Idol~
28%
Tags
  • Chuunibyou Protagonist
  • Nympho Heroine
  • Kinetic Novel
  • Only a Single Heroine
  • Sexual Content
Rating 6.9334 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!~
28%
Tags
  • Only Blood-related Heroines
  • Only Protagonist's Sisters as Heroine(s)
  • Unnamed Protagonist
  • Twin Footjob
  • Oppai Loli Heroine
Rating 6.3720 Users
Pure Marriage ~Akai Ito Monogatari - Harem Hen~
Pure Marriage ~Akai Ito Monogatari - Harem Hen~
28%
Tags
  • Polygamy
  • Wedding
  • Protagonist's Sister as a Heroine
  • Modern Tsundere Heroine
  • Harem Ending
Rating 6.6527 Users
shin-neko ~Saikai Shita Imouto to no Arata na Kankei~
shin-neko ~Saikai Shita Imouto to no Arata na Kankei~
28%
Tags
  • Straight Lolicon
  • Only Blood-related Heroines
  • Only Protagonist's Sisters as Heroine(s)
  • Only Younger Heroines
  • Only Loli Heroines
Rating 6.5030 Users
Isekai Fuuzoku, Hajimemashita!? ~Tensei Shitara Harem Seikatsu ga Mattemashita~
Isekai Fuuzoku, Hajimemashita!? ~Tensei Shitara Harem Seikatsu ga Mattemashita~
27%
Tags
  • Undead Heroine
  • Dragon Heroine
  • Kneepit Sex
  • Heroine with Wings
  • Angel Heroine
Rating 6.6645 Users
AI Love: Koisuru Otome wa Kikaijikake
AI Love: Koisuru Otome wa Kikaijikake
27%
Tags
  • Technician Protagonist
  • Robot Heroine
  • Scientist Protagonist
  • AI Heroine
  • Under the Same Roof
Rating 7.0531 Users
Onii-chan Teacher ~Himitsu no Jugyou o Kibou Shimasu!~
Onii-chan Teacher ~Himitsu no Jugyou o Kibou Shimasu!~
27%
Tags
  • Braless Heroine
  • Heroine with Flat Chest (Non-Loli)
  • Sexually Oblivious Heroine
  • Only Blood-related Heroines
  • Only Protagonist's Sisters as Heroine(s)
Rating 6.8850 Users
Renran Spirichu
Renran Spirichu
26%
Tags
  • Student Council President Protagonist
  • Breast Expansion
  • Ghost Support Character
  • Heroine with Chinese Dress
  • Promiscuity
Rating 7.2043 Users
Summer☆Camp
Summer☆Camp
26%
Tags
  • Shotacon Heroine
  • Summer Camp
  • Popular Protagonist
  • Promiscuity
  • Heroine with Swimsuits
Rating 6.0931 Users
Natsuiro Ramune
Natsuiro Ramune
25%
Tags
  • Countryside
  • Childhood Friend Support Character
  • Group of Friends
  • Class President Heroine
  • Childhood Promise
Rating 6.9753 Users
Adebana Sacrament -Seinaru Miwaza to Akuryoutsuki no Shoujo-tachi-
Adebana Sacrament -Seinaru Miwaza to Akuryoutsuki no Shoujo-tachi-
25%
Tags
  • Possession
  • Student-Teacher Romance
  • Bleep Censor
  • Demon Heroine
  • Student Council President Heroine
Rating 6.5722 Users

Natsu Ecchi 2 ~Futago to Inaka no Natsuyasumi~ 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 (34 total)

NameScoreImportanceWeight
Blood-related Uncle/Niece Incest2.002.845.68
Unnamed Protagonist3.001.885.64
Protagonist's Niece as a Heroine2.002.785.57
Oppai Loli Heroine2.502.205.49
Sister/Sister Incest2.002.384.76
Straight Lolicon3.001.504.51
Shimaidon Ending2.002.134.25
Only Loli Heroines2.331.774.13
Countryside2.002.054.11
Twin Sisters as Heroines2.001.823.65
Genius Heroine2.001.773.53
Threesome Ending2.001.743.48
Facesitting2.001.653.30
Harem Ending2.001.402.81
Twin Blowjob2.001.292.58
Bathroom Sex2.001.192.38
Pregnant Sex2.001.182.35
Lesbian Sex2.001.152.30
Quickie Fix Position2.001.112.23
Only Virgin Heroines2.001.082.17
Sixty-nine2.001.072.14
Standing Sex2.001.062.11
Naked Sprites2.001.052.11
Adult Protagonist2.001.032.05
Outdoor Sex2.001.001.99
Missionary Position2.000.941.88
Cunnilingus2.000.931.86
Group Sex of One Male and Several Females2.000.921.83
Cowgirl2.000.841.68
Defloration2.000.761.52
Multiple Endings2.000.671.34
Nukige2.000.651.30
Male Protagonist2.000.300.61
ADV2.000.150.29

Traits (40 total)

NameCharactersImportanceWeight
Twin Sister Role21.862.04
Reverse Spitroast Subject of (Sexual)21.842.02
Twin Blowjob Engages in (Sexual)21.451.59
Reverse Cowgirl Engages in (Sexual)12.221.54
Spats Clothes12.201.52
Kid Body21.371.50
Tiny Braid Hair12.071.43
Lonely Role12.051.42
Genius Personality11.991.38
Standing Sex Subject of (Sexual)21.181.29
Group Sex of One Male and Several Females Engages in (Sexual)21.171.29
Butterfly Subject of (Sexual)21.171.29
String Ribbon Tie Clothes11.821.26
Hair Ribbon Clothes11.791.24
Side Tail Hair11.751.21
Reverse Missionary Subject of (Sexual)11.731.20
Quickie Fix Subject of (Sexual)21.081.19
Cyan Eyes11.661.15
Garnet Eyes11.661.15
Nipple Teasing Subject of (Sexual)11.571.09
Older Sister Role11.561.08
Doggy Style Subject of (Sexual)20.931.02
Shoulder-length Hair20.921.01
Younger Sister Role11.441.00
Tank Top Clothes11.420.98
Hairpin Clothes11.400.97
Pleated Skirt Clothes11.400.97
Knee-high Socks Clothes11.380.96
Virgin Sex Engages in (Sexual)20.850.93
Sixty-nine Engages in (Sexual)11.260.87
Blowjob Engages in (Sexual)20.760.84
Blue Hair11.190.83
Cunnilingus Subject of (Sexual)11.160.81
Shirt Clothes11.160.80
Boobjob Engages in (Sexual)11.070.74
Sitting Sex Subject of (Sexual)11.060.74
Cowgirl Subject of (Sexual)10.950.66
Slim Body20.580.63
Blond Hair10.890.62
Pale Body20.370.41