---
title: "Koiiro Soramoyou"
description: "The protagonist, Itou Seigo, son of famous scientists, due to his parents' circumstances and the construction of Kamina Bridge, moved from Tokyo to Kamina Islan"
image: "https://t.vndb.org/cv/95/137595.jpg"
---

# Koiiro Soramoyou

![Koiiro Soramoyou](https://t.vndb.org/cv/95/137595.jpg)

**Alternative Title:** 恋色空模様

**Aliases:** 恋空, Koisora

**Developer:** Studio Ryokucha

**Release date:** Mar 26, 2010

**Platform:** Windows

**Language:** Japanese, Chinese (simplified)

**Rating:** 7.6/10 (271 votes)

## Description
The protagonist, Itou Seigo, son of famous scientists, due to his parents' circumstances and the construction of Kamina Bridge, moved from Tokyo to Kamina Island and transferred to Kamina Academy. He reunited with his childhood friend and stepsister. Moreover, in peculiar circumstances, he also met a cold beauty, wielding a Japanese sword; a member of the Disciple Committee with blond hair, who has an aura of seduciness around her; and the daughter of a rich family, who is also the head of the student council. And so his rich school life truly began, filled with hassles from the Disciple Committee, dreadful guards of school discipline, led by the severe and ruthless teacher Serizawa.

...But good things never last long. Following the arrival of the mysterious person on the island, cruel events began to occur one by one. At the beginning, Seigo was rather indifferent, since he had not much attachment to his new environment, yet the distress developed and involved the whole island. Not even his friends were left untouched...

Seigo felt fury against unreasonable adults and made a decision to fight for the academy and the whole island, which were precious to his dear friends.

[Translated and edited from [pixiv](https://dic.pixiv.net/a/%E6%81%8B%E8%89%B2%E7%A9%BA%E6%A8%A1%E6%A7%98)]

## Characters
### Hattori Aya (服部 彩)
- **Gender:** Female
- **Measurements:** Height: 155cm, Weight: 42kg, Bust-Waist-Hips: 80-58-84cm, B cup
- **Birthday:** 5 May
- **Hair:** Red, Short
- **Eyes:** Brown
- **Clothes:** Sport Bloomers, Bikini, Hairpin, Sports Uniform, Ribbon Tie, Old Type School Swimsuit, Sailor School Uniform
- **Personality:** Airhead, Food Lover, Energetic, Atashi, Sleepyhead, Animal Speech
- **Role:** Aunt, Friend, Childhood Friend, Student Club Member, Schoolmate, Classmate, Senpai, Kouhai, High School Student, Younger Sister, Older Sister, Bad Student, Biker
- **Subject of:** Teasing
- **Items:** Motorcycle
- **Body:** Medium Breasts
- **Voiced by:** Agumi Oto

### Itou Mikoto (伊東 美琴)
- **Gender:** Female
- **Aliases:** Imouto-chan, Miko-chan
- **Measurements:** Height: 152cm, Weight: 40kg, Bust-Waist-Hips: 78-55-82cm, A cup
- **Birthday:** 15 December
- **Hair:** Ponytail, Short, Grey
- **Body:** Slim, Pale
- **Eyes:** Violet
- **Personality:** Modern Tsundere, Classic Tsundere, Short-tempered, Rude, Brother Complex, Envious, Jealous, Childishly Violent
- **Role:** Daughter, Step Sister, Friend, Childhood Friend, Student Club Member, Schoolmate, Classmate, Kouhai, High School Student, Non-blood-related Daughter, Younger Sister, Health Committee Member
- **Subject of:** Illness, Asthma
- **Clothes:** Bikini, Naked Apron, Ribbon Tie, Sailor School Uniform
- **Voiced by:** Natsuno Koori

### Kanou Kayoko (加納 佳代子)
- **Gender:** Female
- **Measurements:** Height: 163cm, Weight: 48kg, Bust-Waist-Hips: 85-59-84cm, D cup
- **Birthday:** 10 October
- **Hair:** Black, Ahoge, Waist Length+
- **Engages in:** Swordsmanship, Fighting, Murder, Sports, Kendo, Assault, Betrayal, Competition, Duel, Attempted Murder, Suicide Attempt, Bad Cooking
- **Role:** Orphan, Rival, Student Club Member, Assassin, Schoolmate, Classmate, Senpai, Kouhai, High School Student, Homeless, Younger Sister, Lonely, Living Alone
- **Eyes:** Green
- **Clothes:** Sport Bloomers, Knee-high Socks, Bikini, Sports Uniform, Ribbon Tie, Ribbon Hair Accessory, Sailor School Uniform, Naked Shirt
- **Items:** Katana, Club
- **Personality:** Shy, Strict, Clumsy, Food Lover, Antisocial, Flustered, Watashi, Animal Speech
- **Subject of:** Hypnotism, Child Abuse, Teasing, Exile, Memory Alteration, Guilt
- **Body:** Big Breasts
- **Voiced by:** Tooyama Eriko

### Shinohara Sera (篠原 聖良)
- **Gender:** Female
- **Measurements:** Height: 160cm, Weight: 44kg, Bust-Waist-Hips: 82-57-84cm, C cup
- **Birthday:** 25 March
- **Hair:** Blond, Twin Tails, Waist Length+
- **Engages in:** Cooking, Fighting, Teasing, Sports, Cosplay, Flirting, Seduction, Competition, Duel, Bunnygirl Cosplay, Turndown
- **Subject of:** Assault, Injury, Piggyback Ride, Bridal Carry
- **Eyes:** Blue
- **Clothes:** Sport Bloomers, Thigh-high Stockings, Swimsuit, Bikini, Hairpin, Panties, Bra, Sports Uniform, Ribbon Tie, Strapless Swimsuit, Sailor School Uniform
- **Personality:** Outgoing, Classic Tsundere, Food Lover, Energetic, Kansai-ben, Confident, Assertive, Competitive, Watashi, Loner
- **Role:** Domestic Partner, Girlfriend, Friend, Rival, Student Club Member, Schoolmate, Classmate, Senpai, Kouhai, High School Student, Honor Student, Discipline Committee Member, Same Year Student
- **Items:** Tonfa
- **Voiced by:** Tsukishiro Mana

### Utsumi Shizuna (内海 静奈)
- **Gender:** Female
- **Measurements:** Height: 167cm, Weight: 48kg, Bust-Waist-Hips: 88-59-87cm, E cup
- **Birthday:** 31 August
- **Hair:** Twin Tails, Waist Length+, Grey
- **Eyes:** Violet
- **Clothes:** Kimono, Sport Bloomers, Bikini, Sports Uniform, Ribbon Tie, Ribbon Hair Tie
- **Personality:** Friendly, Kind, Stubborn, Smart
- **Role:** Granddaughter, Friend, Childhood Friend, Student Club Member, Student Council President, Schoolmate, Senpai, High School Student, Popular, Ojousama, Repeater
- **Subject of:** Arranged Marriage
- **Engages in:** Breakup
- **Body:** Big Breasts
- **Voiced by:** Sakura Hazuki

### Hashimoto Yuuki (橋本 優喜)
- **Gender:** Female
- **Measurements:** Height: 160cm, Weight: 46kg, Bust-Waist-Hips: 85-58-84cm, D cup
- **Birthday:** 29 November
- **Hair:** Pink, Short
- **Eyes:** Green
- **Personality:** Friendly
- **Role:** Friend, Student Club Member, Schoolmate, Classmate, Senpai, Kouhai, High School Student, Discipline Committee Member
- **Clothes:** Ribbon Tie
- **Voiced by:** Kazane

### Miki Machiko (三木 真智子)
- **Gender:** Female
- **Aliases:** ちこちゃん, Chiko-chan, まっちゃん, Mat-chan
- **Measurements:** Height: 158cm, Weight: 48kg, Bust-Waist-Hips: 81-59-83cm, B cup
- **Hair:** Black
- **Eyes:** Blue
- **Clothes:** Glasses, Miko's Dress, Torn Pantyhose (damaged), Sailor School Uniform, Contact Lenses
- **Personality:** Stoic, Serious
- **Role:** Friend, Schoolmate, Classmate, Senpai, Kouhai, High School Student, Unpopular, Discipline Committee Member
- **Engages in:** Competition, Graduation
- **Voiced by:** Aoyama Yukari

### Mounai Kiyomi (毛内 清美)
- **Gender:** Female
- **Measurements:** Height: 168cm, Weight: 45kg, Bust-Waist-Hips: 86-59-84cm, E cup
- **Hair:** Black, Shoulder-length
- **Clothes:** School Uniform
- **Role:** Friend, Childhood Friend, Student Club Member, Student Council Member, Schoolmate, Classmate, Senpai, High School Student, Student Council Vice President
- **Personality:** Tomboy
- **Body:** Big Breast Sizes
- **Eyes:** Garnet
- **Voiced by:** Kimura Ayaka

### Nakanishi Aiko (中西 藍子)
- **Gender:** Female
- **Measurements:** Height: 153cm, Weight: 40kg, Bust-Waist-Hips: 80-56-83cm, A cup
- **Hair:** Long, Wavy, Shoulder-length, Grey, Blunt Bangs
- **Body:** Teen, Slim, Pale
- **Eyes:** Red
- **Personality:** Shy, Timid
- **Role:** Friend, Student Club Member, Student Council Member, Schoolmate, Classmate, Kouhai, High School Student
- **Clothes:** Sailor School Uniform, Ribbon Headband
- **Voiced by:** Wakaba Tsubaki

### Mikasa Akari (三笠 月理)
- **Gender:** Female
- **Measurements:** Height: 146cm, Weight: 38kg, Bust-Waist-Hips: 74-54-72cm
- **Birthday:** 5 February
- **Hair:** Violet, Shoulder-length, Grey, Parted in Middle
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Glasses, T-shirt, Sport Bloomers, Knee-high Socks, Lab Coat, Tracksuit
- **Role:** Orphan, Schoolmate, High School Student, Living Alone
- **Personality:** Secretive, Stoic, Genius
- **Items:** Handgun, Hand Fan
- **Eyes:** Garnet

## Shops
- [Official Website](http://web.archive.org/web/20100414030818/http://www.studio-ryokucha.com/koisora/)

## Releases
### Japanese
- **2009-09-04**: Koiiro Soramoyou - Trial Edition - [Official website](http://www.studio-ryokucha.com/koisora/download.html)
- **2009-09-19**: Koiiro Soramoyou - TG version - [Official website](https://web.archive.org/web/20160331210850/http://www.techgian.jp/official/tg200911/)
- **2010-03-26**: Koiiro Soramoyou - First Press Edition - [Official website](http://web.archive.org/web/20100414030818/http://www.studio-ryokucha.com/koisora/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=12441)
- **2011-06-17**: Koiiro Soramoyou - Regular Edition - [Official website](http://web.archive.org/web/20100414030818/http://www.studio-ryokucha.com/koisora/)
- **2014-08-15**: Koiiro Soramoyou - Download Edition - [Official website](http://web.archive.org/web/20100414030818/http://www.studio-ryokucha.com/koisora/), [DMM](https://dlsoft.dmm.co.jp/detail/green_0004/)

### Chinese (simplified)
- **2020-10-01**: Lianse kong Muyang - [Official website](https://tieba.baidu.com/p/6991914186)

## Tags
Sexual Content, ADV, High School, Combat with Bladed Weapons, Combat with Blunt Weapons, Combat with Exotic Weapons, Non-blood-related Brother/Sister Incest, Romance, Brother/Sister Romance, Kuudere Heroine, Oneesan-type Heroine, Protagonist's Senpai as a Heroine, Male Protagonist, Multiple Endings, School Life Comedy, Amnesia, Foolish Friend, Late Branching Plot, Ojousama Heroine, Airhead Heroine, Classic Tsundere Heroine, Deredere Heroine, Student Council, Protagonist's Childhood Friend as a Heroine, Modern Day Japan, Protagonist's Non-blood-related Sister as a Heroine, Leader Protagonist, School Nurse Support Character, Late Sexual Content, Battle of Wits, Student Heroine, Floating Textbox, Island, Donkan Protagonist, Student Club, Love Overcomes All, Student Protagonist, Fictional Modern Day Japanese Countryside, Athletics Festival, Sword Wielding Heroine, Duel, Episodic Story, Tsundere Heroine, Foolish Protagonist, Perverted Protagonist, Other Perspectives, Ponytail Heroine, Proactive Protagonist, Protagonist with a Face, Defloration, Sex in Public Places, Boobjob, Only Virgin Heroines, Conspiracy, Orphan Heroine, Tactician Protagonist, Group of Friends, Wake-up Sex, Desperation, Twin Tail Heroine, Missionary Position, Sixty-nine, Super Deformed CGs, Blowjob, Handjob, Student Council President Heroine, Student Club President Protagonist, Heroine With Kansai Accent, High Amount of Special Effects, Homemaker Protagonist, Protagonist with Phimosis, Discipline Committee Member Heroine, Multiple Opening Movies, Doggy Style, Fictional Modern Day Japanese Island, Otaku Friend, Outdoor Sex, Colored Texts, Siscon Protagonist, Pragmatic Protagonist, Long Common Route, Single Boobjob, Single Handjob, Single Blowjob, High School Student Heroine, Protagonist's Younger Sister as a Heroine, Heroine with Flat Chest (Non-Loli), Uncredited Voice Acting, Homecoming, Protagonist's Rival as a Heroine, Rebellion, Political Corruption, Suspense, Genre Shift, Major Antagonist, Sprite Viewer, Bleep Censor, Flashback

## More Games from Studio Ryokucha
- [Megami-sama ☆ ni Onegai!! -Mayonaka no Boukensha-](https://pinovel.net/v5249)
- [Kajitsu](https://pinovel.net/v4316)
- [Miko-san Hosoude Hanjouki](https://pinovel.net/v5254)
- [Miko-san Hosoude Hanjouki Extra](https://pinovel.net/v5255)
- [Princess Serenade](https://pinovel.net/v1962)
- [Miko-san Fighter! Ryouko-chan](https://pinovel.net/v533)
- [Katakoi no Tsuki](https://pinovel.net/v1075)
- [Anna-chan ☆ ni Onegai!!](https://pinovel.net/v6973)
- [Magica Ride](https://pinovel.net/v825)
- [Katakoi no Tsuki Extra](https://pinovel.net/v1047)
- [Koiiro Soramoyou](https://pinovel.net/v1740)
- [Koiiro Soramoyou: After Happiness and Extra Hearts](https://pinovel.net/v5562)
- [Shukufuku no Kane no Ne wa, Sakurairo no Kaze to Tomo ni](https://pinovel.net/v10617)
- [Minamijuujisei Renka](https://pinovel.net/v12658)
- [Hanikami Clover](https://pinovel.net/v17969)
- [Natsuiro Koi Uta](https://pinovel.net/v19713)

---
*View the full details at [pinovel.net/v1740](https://pinovel.net/v1740).*

```json
{"@context":"https://schema.org","@type":"VideoGame","@id":"https://pinovel.net/v1740#game","name":"Koiiro Soramoyou","description":"The protagonist, Itou Seigo, son of famous scientists, due to his parents' circumstances and the construction of Kamina Bridge, moved from Tokyo to Kamina Islan","url":"https://pinovel.net/v1740","image":"https://t.vndb.org/cv/95/137595.jpg","author":{"@type":"Organization","name":"Studio Ryokucha"},"aggregateRating":{"@type":"AggregateRating","ratingValue":"7.6","bestRating":10,"worstRating":1,"ratingCount":271}}
```