---
title: "Kokoro no Sumika"
description: "This is Yatagarasu’s debut work. Chihiro likes his imouto Rina, but she doesn’t want him around. In fact, Rina loves her older sister Matsuri, who in turns like"
image: "https://t.vndb.org/cv/63/28663.jpg"
---

# Kokoro no Sumika

![Kokoro no Sumika](https://t.vndb.org/cv/63/28663.jpg)

**Alternative Title:** ココロの住処

**Aliases:** A Home of Kokoro

**Developer:** Yatagarasu

**Release date:** Apr 23, 2010

**Platform:** Windows

**Language:** Japanese

**Rating:** 6.6/10 (30 votes)

## Description
This is Yatagarasu’s debut work. Chihiro likes his imouto Rina, but she doesn’t want him around. In fact, Rina loves her older sister Matsuri, who in turns likes Chihiro! In the midst of this (taboo?) love triangle, their scientist parents sent them some packages and Chihiro opened them and found some weird stuff. His father returns shortly after with a strange girl and introduces her as an android named Kokoro.

[From [Hau~ Omochikaeri!](https://omochikaeri.wordpress.com/2010/04/02/april-2010-eroge-releases/)]

## Characters
### Masaki Chihiro (真崎 智尋)
- **Gender:** Male
- **Aliases:** Chii-kun, ちーくん, Chii-nii, ちー兄ぃ
- **Measurements:** Height: 177cm
- **Hair:** Black, Violet, Short, Straight, Spiky Bangs, Parted to Side
- **Body:** Teen, Slim, Pale
- **Engages in:** Cooking
- **Eyes:** Black
- **Clothes:** T-shirt, Shorts, Hoodie, Gakuran
- **Personality:** Ore, Idiot, Pervert, Kind, Honest, Sister Complex, Optimist, Whimsical
- **Role:** Son, Full Brother, Cousin, Childhood Friend, Classmate, Tsukkomi, Younger Brother, Older Brother, Middle Brother, Eleventh Grader, Same Year Student

### Arisada Kaede (有定 かえで)
- **Gender:** Female
- **Measurements:** Height: 165cm
- **Hair:** Blond, Waist Length+, Wavy, Braid, Ringlet, Blunt Bangs
- **Body:** Teen, Slim, Pale, Big Breasts
- **Eyes:** Blue, Tareme
- **Clothes:** Coat, Glasses, Headband, Necktie, Shirt, Cardigan, T-shirt, Miniskirt, Knee-high Socks, Bikini, Pendant Necklace, Clothing with Ribbons, Ribbon Hair Tie, Sailor School Uniform
- **Personality:** Idiot, Reserved, Kind, Naive, Docile, Absentminded, BL Fan
- **Role:** Childhood Friend, Eleventh Grader, Same Year Student
- **Subject of:** Teasing
- **Items:** Umbrella
- **Voiced by:** Ueda Akane

### Kokoro (ココロ)
- **Gender:** Female
- **Aliases:** MSR―2000RRX, RRX
- **Measurements:** Height: 160cm
- **Hair:** White, Bun, Ponytail, Waist Length+, Blunt Bangs, Twin Braids, Tiny Braid
- **Body:** Teen, Slim, Pale, Big Breast Sizes
- **Clothes:** Dress Shoes, Apron, Jacket, Skirt, Thigh-high Stockings, Maid's Dress, Beret, Bikini, Garter Belt Stockings, Hair Flower, High Heels, Turtleneck Shirt, Ribbon Tie, Ribbon Hair Tie, Furisode, Maid's Headdress
- **Engages in:** Cooking, Fighting, Cleaning, Sarcasm
- **Personality:** Stoic, Rude, Smart
- **Role:** Mother, Robot, Cyborg
- **Eyes:** Tsurime, Teal
- **Voiced by:** Oukawa Mio

### Kurozuka Suu (黒塚 崇)
- **Gender:** Female
- **Measurements:** Height: 157cm
- **Hair:** Black, Twin Tails, Waist Length+, Eye Covering, Parted to Side
- **Body:** Teen, Slim, Pale, Fang
- **Clothes:** School Uniform, Trench Coat, Mini-dress, Necktie, T-shirt, Miniskirt, Knee-high Socks, Lab Coat, Tank Top, Bikini, Overall, Turtleneck Shirt, Clothing with Ribbons, Hair Tie, Shimapan
- **Eyes:** Red, Heterochromia, Tsurime
- **Personality:** Shy, Stubborn, Strange, Genius, Mischievous
- **Role:** Scientist, Classmate, High School Student
- **Voiced by:** Miyazawa Yuana

### Masaki Matsuri (真崎 茉梨)
- **Gender:** Female
- **Measurements:** Height: 155cm
- **Hair:** Ahoge, Ponytail, Long, Straight, Parted to Side, Orange, Sidehair
- **Body:** Slim, Pale, Young-adult, Big Breasts
- **Engages in:** Cooking, Cleaning
- **Eyes:** Grey, Tareme
- **Clothes:** Dress, Mini-dress, Jacket, Necktie, Cardigan, Skirt, One Piece Swimsuit, Hair Flower, Pendant Necklace, Blouse, Turtleneck Dress, Ribbon Hair Accessory, Furisode, Sailor School Uniform
- **Personality:** Airhead, Relaxed, Kind, Brother Complex
- **Role:** Daughter, Full Sister, Cousin, Childhood Friend, Senpai, Older Sister, Twelfth Grader
- **Voiced by:** Yukimura Toa

### Masaki Rina (真崎 璃奈)
- **Gender:** Female
- **Aliases:** Ricchan, りっちゃん
- **Measurements:** Height: 162cm
- **Hair:** Brown, Short, Side Tail, Parted to Side
- **Body:** Teen, Slim, Pale, Medium Breasts
- **Eyes:** Hazel, Tsurime
- **Clothes:** Mini-dress, Pajamas, Jacket, T-shirt, Miniskirt, Shorts, Sport Bloomers, Thigh-high Stockings, Hoodie, Tank Top, Bikini, Hair Flower, Pendant Necklace, Flower, Rubber Band With Beads, Furisode, Sailor School Uniform
- **Personality:** Modern Tsundere, Serious, Sister Complex, Atashi, Sharp-tongued, Childishly Violent
- **Role:** Daughter, Full Sister, Cousin, Girlfriend, Childhood Friend, School Sports Club Member, Kouhai, Younger Sister, Tenth Grader
- **Engages in:** Badminton
- **Voiced by:** Suzune Kagetsu

### Isoji Kensei (磯次 賢正)
- **Gender:** Male
- **Measurements:** Height: 178cm
- **Hair:** Short, Green, V Bangs, Sidehair
- **Body:** Teen, Slim, Pale
- **Clothes:** Trousers, Suit, Shirt, Belt, Gakuran
- **Eyes:** Violet, Tareme
- **Personality:** Narcissist, Strange
- **Role:** Friend, Wealthy, High School Student, Honor Student
- **Engages in:** Not Sexually Involved
- **Voiced by:** Kurusugawa Isamu

### Masaki Kentarou (真崎 剣太郎)
- **Gender:** Male
- **Aliases:** Ken-chan, 剣ちゃん
- **Measurements:** Height: 178cm
- **Hair:** Brown, Short, No Bangs, Slicked Back
- **Body:** Slim, Pale, Adult
- **Clothes:** Trousers, Glasses, Shirt, Vest, Watch, Name Tag
- **Eyes:** Blue, Hosome
- **Engages in:** Smoking, Genetic Research
- **Role:** Husband, Father, Scientist
- **Personality:** Kind, Genius, Docile
- **Items:** Cigarette
- **Voiced by:** Takizawa Atsuya

### Masaki Yaeko (真崎 八惠子)
- **Gender:** Female
- **Hair:** Violet, Ahoge, Long, Parted to Side
- **Body:** Slim, Pale, Young-adult, Big Breast Sizes, Younger Appearance
- **Eyes:** Grey, Tareme
- **Clothes:** Dress, Necktie, Shirt, Wristband, Skirt, Belt, Pendant Necklace
- **Role:** Wife, Mother, Scientist
- **Voiced by:** Yukimura Toa

### Nakayama Minori (仲山 美乃里)
She usually wears heels, which add to her normal height 7 cm, making her 176 cm tall in total.

- **Gender:** Female
- **Measurements:** Height: 169cm
- **Hair:** Violet, Long, Spiky Bangs
- **Body:** Slim, Pale, Adult
- **Clothes:** Trousers, Necklace, T-shirt, Skirt, Belt, Lab Coat, Court Shoes, High Heels, Pendant Necklace, Bracelet, Pendant Earrings
- **Eyes:** Green, Tareme
- **Engages in:** Drinking, Not Sexually Involved
- **Role:** Medical Doctor
- **Personality:** Strict, Mature, Docile
- **Voiced by:** Kawano Nene

### Saiguuji Kanon (斎宮寺 火音)
- **Gender:** Male
- **Measurements:** Height: 192cm
- **Hair:** Red, Short, Parted to Side
- **Body:** Teen, Slim, Pale
- **Personality:** Hotblooded, Tsundere, Smart, Nature Lover, Dishonest
- **Eyes:** Blue, Hosome
- **Clothes:** Suit, Glasses, Necktie
- **Role:** Cousin, Teacher
- **Subject of:** Psychological Trauma
- **Voiced by:** Ranmaru

### Arisada Kaede (有定 かえで)
- **Gender:** Female
- **Hair:** Blond, Waist Length+, Braid, Ringlet, Blunt Bangs
- **Body:** Slim, Pale, Kid
- **Eyes:** Blue, Tareme
- **Clothes:** Dress, Glasses, Hat, Headband, Sandals, Clothing with Ribbons, Ribbon Hair Tie
- **Personality:** Idiot, Reserved, Kind, Naive, Docile, Absentminded
- **Role:** Childhood Friend, Present in Flashbacks Only
- **Subject of:** Teasing
- **Voiced by:** Ueda Akane

### Masaki Matsuri (真崎 茉梨)
- **Gender:** Female
- **Hair:** Brown, Ahoge, Ponytail, Long, Parted to Side, Orange
- **Body:** Slim, Pale, Kid
- **Eyes:** Grey, Tareme
- **Clothes:** Dress, Turtleneck Shirt, Ribbon Hair Tie
- **Personality:** Airhead, Relaxed
- **Role:** Daughter, Full Sister, Older Sister, Present in Flashbacks Only
- **Voiced by:** Yukimura Toa

### Masaki Rina (真崎 璃奈)
- **Gender:** Female
- **Hair:** Brown, Short, Side Tail, Parted to Side
- **Body:** Slim, Pale, Kid
- **Eyes:** Hazel, Tsurime
- **Clothes:** Miniskirt, Tank Top, Rubber Band With Beads
- **Role:** Daughter, Full Sister, Younger Sister, Present in Flashbacks Only
- **Voiced by:** Suzune Kagetsu

## Shops
- [Official Website](http://masterup.net/yatanootori/yatagarasu/product/kokoro/index.html)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ007475.html)

## Releases
### Japanese
- **2010-04-12**: Kokoro no Sumika - Trial Edition - [Official website](http://masterup.net/yatanootori/yatagarasu/product/kokoro/index.html)
- **2010-04-23**: Kokoro no Sumika - [Official website](http://masterup.net/yatanootori/yatagarasu/product/kokoro/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=13583)
- **2013-01-18**: Kokoro no Sumika - Download Edition - [Official website](http://masterup.net/yatanootori/yatagarasu/product/kokoro/index.html), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ007475.html), [Gyutto](https://gyutto.com/i/item98540), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0082917/), [DL.Getchu](http://dl.getchu.com/i/item1004187), [DMM](https://dlsoft.dmm.co.jp/detail/hobe_0238/)
- **2013-10-25**: Yatagarasu Full Swing 4 in 1 Pack - [Official website](http://masterup.net/yatanootori/yatagarasu/product/yata4in1/index.htm)

## Tags
ADV, High School, Blood-related Brother/Sister Incest, Incest Romance, Oneesan-type Heroine, AI Heroine, Robot Heroine, Male Protagonist, Otaku Heroine, Airhead Heroine, Heroine with Glasses, Modern Tsundere Heroine, Protagonist's Childhood Friend as a Heroine, Low Sexual Content, Female Protagonist for a Short Time, Late Sexual Content, Dramatic Love Triangle, Under the Same Roof, Slice of Life Drama, Heroine with Heterochromia, Other Perspectives, Emotionless Heroine, High School Student Protagonist, Brocon Heroine, Perverted Friend, Siscon Protagonist, Single Footjob, High School Student Heroine, Heroine with Big Breasts, Defloration, Protagonist's Younger Sister as a Heroine, Outdoor Sex, Protagonist's Full Sister as a Heroine, Protagonist's Older Sister as a Heroine

## More Games from Yatagarasu
- [Kokoro no Sumika](https://pinovel.net/v3555)
- [Yamiyo ni Odore -Witch Wishes to Commit the Night-](https://pinovel.net/v5931)
- [Tentacle Lord -Waga Te ni Ochiyo Yuusou Naru Otome-](https://pinovel.net/v7688)
- [Furuiro Meikyuu Rondo ~HISTOIRE DE DESTIN~](https://pinovel.net/v10001)
- [Seisai no Resonance](https://pinovel.net/v10613)

---
*View the full details at [pinovel.net/v3555](https://pinovel.net/v3555).*

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```