---
title: "Sis Koi"
description: "Yuuichi has twin little sisters, energetic Miyu and tsundere Yui. They keep appealing to him at home and at school, but he doesn’t see them as more than his lit"
image: "https://t.vndb.org/cv/30/27930.jpg"
---

# Sis Koi

![Sis Koi](https://t.vndb.org/cv/30/27930.jpg)

**Alternative Title:** 妹恋～しすこい～

**Developer:** Etoiles

**Release date:** Jul 29, 2011

**Platform:** Windows

**Language:** Japanese

**Rating:** 6.7/10 (19 votes)

## Description
Yuuichi has twin little sisters, energetic Miyu and tsundere Yui. They keep appealing to him at home and at school, but he doesn’t see them as more than his little sisters. One day, he peeked at Honoka changing in the literary club room and somehow it ended with Miyu and Yui joining the club as well. Then his father called him suddenly and revealed that one of the twins was not blood-related to him! Suddenly, he saw them as girls instead of imoutos. How will he be able to withstand their advances?

[From [Hau~ Omochikaeri!](http://omochikaeri.wordpress.com/2011/07/01/july-2011-eroge-releases/)]

## Characters
### Sasayama Yuuichi (笹山 優一)
- **Gender:** Male
- **Measurements:** Height: 172cm
- **Hair:** Black, Curtained, Short, Straight, Parted in Middle
- **Body:** Teen, Pale
- **Clothes:** School Uniform, Trousers, T-shirt, Swim Shorts
- **Personality:** Donkan, Kind
- **Eyes:** Green, Violet, Shihaku Eyes
- **Role:** Full Brother, Childhood Friend, Classmate, Senpai, High School Student, Older Brother

### Kisaragi Honoka (如月 穂花)
- **Gender:** Female
- **Measurements:** Height: 154cm, Bust-Waist-Hips: 90-60-89cm
- **Hair:** White, Twin Tails, Hime Cut, Long, Wavy, Blunt Bangs
- **Body:** Teen, Pale, Big Breasts
- **Clothes:** School Uniform, T-shirt, Miniskirt, Thigh-high Stockings, Maid's Dress, Bikini, Nurse Uniform, Hairpin, Miko's Dress, Bunny Dress, Maid's Headdress, Nurse's Cap, Nightgown
- **Eyes:** Blue, Tareme
- **Personality:** Secretive, Reserved, Shy, Timid, Bookworm, Quiet
- **Role:** Kouhai, Wealthy, High School Student, Ojousama
- **Engages in:** Cosplay
- **Items:** Book
- **Voiced by:** Miru

### Nonohara Manami (野々原 愛美)
- **Gender:** Female
- **Aliases:** Mana-nee, まな姉
- **Measurements:** Height: 160cm, Bust-Waist-Hips: 84-57-79cm
- **Hair:** Black, Waist Length+, Straight, Parted to Side, Sidehair
- **Body:** Teen, Pale
- **Clothes:** School Uniform, Mini-dress, Jacket, Knee-high Socks, Thigh-high Stockings, Bikini, Miko's Dress, Ribbon Hair Accessory
- **Engages in:** Cooking
- **Eyes:** Amber
- **Role:** Childhood Friend, Miko, Classmate, High School Student, Yamato Nadeshiko, Popular
- **Personality:** Refined, Kind, Smart, Serious, Coward
- **Subject of:** Phasmophobia
- **Voiced by:** Suzuki Kei

### Sasayama Miu (笹山 未優)
- **Gender:** Female
- **Measurements:** Height: 155cm, Bust-Waist-Hips: 80-56-83cm
- **Hair:** Red, Waist Length+, Straight
- **Body:** Teen, Pale
- **Clothes:** School Uniform, Mini-dress, Pajamas, Gloves, Shorts, Thigh-high Stockings, Maid's Dress, Tank Top, Wedding Dress, Bikini, Garter Belt Stockings, Hairpin, Veil, Ribbon Hair Accessory, Bridal Gauntlet, Maid's Headdress
- **Eyes:** Green
- **Subject of:** Accident
- **Role:** Full Sister, Twin Sister, Kouhai, High School Student, Younger Sister
- **Items:** Lollipop
- **Personality:** Smart, Brother Complex, Mischievous
- **Engages in:** Wedding
- **Voiced by:** Fujimori Yukina

### Sasayama Yui (笹山 優衣)
- **Gender:** Female
- **Measurements:** Height: 152cm, Bust-Waist-Hips: 72-54-77cm
- **Hair:** Blond, Twin Tails, Waist Length+
- **Body:** Teen, Pale, Small Breasts
- **Clothes:** School Uniform, Mini-dress, T-shirt, Shorts, Thigh-high Stockings, Wedding Dress, One Piece Swimsuit, Hairpin, Veil, Ribbon Hair Tie, Shimapan, Bridal Gauntlet, Naked Shirt
- **Eyes:** Violet
- **Personality:** Modern Tsundere, Brother Complex
- **Role:** Twin Sister, Non-blood-related Sister, Kouhai, High School Student, Non-blood-related Daughter, Younger Sister
- **Items:** Lollipop
- **Engages in:** Wedding
- **Subject of:** Piggyback Ride
- **Voiced by:** Ueda Akane

### Sasayama Taichi (笹山 太一)
- **Gender:** Male
- **Measurements:** Height: 176cm
- **Clothes:** Trousers, Shirt, Garter
- **Role:** Father, Civil Servant

### Shinjou Tsumugi (新城 つむぎ)
- **Gender:** Female
- **Measurements:** Height: 154cm, Bust-Waist-Hips: 79-55-78cm
- **Hair:** Blue, Bun, Odango, Curtained, Short, Braid, Braided Hair Loopies
- **Body:** Teen, Pale
- **Clothes:** School Uniform, Miniskirt, Thigh-high Stockings, Tank Top, Bikini, Bun Covers
- **Eyes:** Green
- **Personality:** Airhead, Energetic, Talkative
- **Role:** Schoolmate, High School Student, School Newspaper Club Member
- **Items:** Mobile Phone
- **Voiced by:** Hinaki Ai

### Suzumoto Haruka (涼本 春夏)
- **Gender:** Female
- **Measurements:** Height: 158cm, Bust-Waist-Hips: 82-56-84cm
- **Hair:** Brown, Twin Tails, Waist Length+, Straight
- **Body:** Teen, Pale
- **Clothes:** School Uniform, T-shirt, Shorts, Thigh-high Stockings, Bikini, Ribbon Tie, Ribbon Hair Tie
- **Eyes:** Red
- **Personality:** Friendly, Serious, Blunt
- **Role:** Childhood Friend, Schoolmate, High School Student
- **Voiced by:** Yukimura Toa

### Ukita Yayoi (浮田 弥生)
- **Gender:** Female
- **Measurements:** Height: 162cm, Bust-Waist-Hips: 85-61-88cm
- **Hair:** Brown, Short, Blunt Bangs, Parted to Side
- **Body:** Pale, Young-adult
- **Eyes:** Blue
- **Clothes:** Glasses, Skirt Suit
- **Role:** Teacher
- **Personality:** Blunt
- **Voiced by:** Kawashima Rino

## Shops
- [Official Website](http://etoiles-soft.com/products/shisukoi/index.html)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ009832.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=708015)

## Releases
### Japanese
- **2011-06-27**: Sis Koi - Trial Edition - [Official website](http://etoiles-soft.com/products/shisukoi/download.html)
- **2011-07-29**: Sis Koi - [Official website](http://etoiles-soft.com/products/shisukoi/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=15288), [Getchu](http://www.getchu.com/soft.phtml?id=708015)
- **2015-12-11**: Sis Koi - Download Edition - [Official website](http://etoiles-soft.com/products/shisukoi/index.html), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ009832.html), [Gyutto](https://gyutto.com/i/item160192), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0128525/), [DL.Getchu](http://dl.getchu.com/i/item1005417), [DMM](https://dlsoft.dmm.co.jp/detail/ggs_1020/)

## Tags
Sexual Content, ADV, Sister/Sister Incest, Blood-related Brother/Sister Incest, Non-blood-related Incest, Non-blood-related Brother/Sister Incest, Comedy, Miko Heroine, Male Protagonist, Multiple Endings, Ojousama Heroine, Modern Tsundere Heroine, Deredere Heroine, Protagonist's Childhood Friend as a Heroine, Protagonist's Non-blood-related Sister as a Heroine, Map Movement, Twin Sisters as Heroines, Under the Same Roof, Unlockable Routes, Donkan Protagonist, Childhood Promise, Bookworm Heroine, Student Club, Big Breast Sizes Heroine, Student Protagonist, Protagonist's Kouhai as a Heroine, Defloration, Boobjob, Wake-up Sex, Twin Tail Heroine, Missionary Position, Blowjob, Student Club Member Heroine, Brocon Heroine, Doggy Style, Tribadism on Penis, High School Student Heroine, Heroine with Big Breasts, Shimaidon, Heroine with Small Breasts (Non-Loli)

## More Games from Etoiles
- [Hime x Hime](https://pinovel.net/v2057)
- [Elle:PrieR ~Shiawase no Kakera o Sagashite~](https://pinovel.net/v3811)
- [Sis Koi](https://pinovel.net/v6996)
- [Colorful☆Cure](https://pinovel.net/v9909)
- [Himitsu no Otome ~Boku ga Onna no Ko ni Natta Wake~](https://pinovel.net/v10931)
- [Mizukano! ~Mizugi no Kanojo to H Shiyo~](https://pinovel.net/v12333)
- [Koi Doki](https://pinovel.net/v14768)
- [Momonoko Sweepers!](https://pinovel.net/v16437)

---
*View the full details at [pinovel.net/v6996](https://pinovel.net/v6996).*

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```