---
title: "Imouto Koukan!"
description: "While their parents are out of town for a few days, best friends Takamichi and Kousuke agree to swap their younger sisters.  It starts out as a joke, but surpri"
image: "https://t.vndb.org/cv/07/86507.jpg"
---

# Imouto Koukan!

![Imouto Koukan!](https://t.vndb.org/cv/07/86507.jpg)

**Alternative Title:** 妹こうかん！

**Aliases:** Young Sisters Are Exchanged!

**Developer:** RED-ZONE

**Release date:** Aug 28, 2009

**Platform:** Windows

**Language:** Japanese

**Rating:** 5.8/10 (10 votes)

## Description
While their parents are out of town for a few days, best friends Takamichi and Kousuke agree to swap their younger sisters.  It starts out as a joke, but surprisingly, both sisters agree to the plan, and the trade becomes a reality.

Takamichi's outgoing and popular sister Akari secretly has feelings for her brother, but she tends to tends to act in the opposite direction of her feelings.  She leaves home to go live with Kousuke.

Meanwhile, Kousuke's shy and awkward sister Ayane temporarily moves in with Takamichi.  While she is usually very reserved, she boldly crawls into his bed at night.  "If I don't do this, I won't be able to sleep."

This new situation gives rise to many new feelings.  What kind of ending awaits?

## Characters
### Yuuki Takamichi (結城 孝道)
- **Gender:** Male
- **Role:** Older Brother

### Yoshizaki Ayane (吉崎 綾音)
- **Gender:** Female
- **Measurements:** Height: 154cm, Bust-Waist-Hips: 76-51-75cm
- **Hair:** Violet, Waist Length+
- **Body:** Teen, Slim, Pale
- **Eyes:** Violet
- **Clothes:** Glasses, Headband
- **Personality:** Shy
- **Role:** Younger Sister, Seventh Grader
- **Voiced by:** Mizushima Rion

### Yuuki Akari (結城 明香里)
- **Gender:** Female
- **Measurements:** Height: 163cm, Bust-Waist-Hips: 88-59-86cm
- **Hair:** Pink, Ponytail, Long
- **Body:** Teen, Slim, Pale, Visible Nipples
- **Eyes:** Green
- **Clothes:** Thigh-high Stockings, Hairpin
- **Role:** Full Sister, Younger Sister, School Swimming Club Member, Seventh Grader
- **Personality:** Brother Complex
- **Voiced by:** Asakura Kanami

### Yoshizaki Kousuke (吉崎 康介)
- **Gender:** Male
- **Hair:** Black, Short
- **Clothes:** Glasses
- **Role:** Friend, Older Brother

## Shops
- [Official Website](http://rzone.jp/imoutokoukan/)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ003975.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=781885)

## Releases
### Japanese
- **2009-08-28**: Imouto Koukan! - Download Edition - [Official website](http://rzone.jp/imoutokoukan/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=12916), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ003975.html), [Gyutto](https://gyutto.com/i/item19031), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0034388/), [DL.Getchu](http://dl.getchu.com/i/item1001891), [DMM](https://dlsoft.dmm.co.jp/detail/ggs_0174/)
- **2009-09-18**: Imouto Koukan! - Package Edition - [Official website](https://fandc.co.jp/rzone/imoutokoukan/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=12916), [Getchu](http://www.getchu.com/soft.phtml?id=663751)
- **2013-09-27**: Red Zone Special Pack Vol.1 - [Official website](https://fandc.co.jp/rzone/sp1/main.html), [Getchu](http://www.getchu.com/soft.phtml?id=781885), [DMM](https://www.dmm.co.jp/mono/pcgame/-/detail/=/cid=1802slpg006/)

## Tags
Sexual Content, ADV, Blood-related Brother/Sister Incest, Imouto-type Heroine, Male Protagonist, Multiple Endings, Loli Heroine, Heroine with Glasses, Nukige, Bondage, High Sexual Content, Netorare, Bad Ending(s), Vibrators, Missionary Position, Brocon Heroine, Doggy Style, Outdoor Sex, Swinging, Standing Sex, Sitting Sex, Quickie Fix Position, Discreet Phone Sex, Tribadism on Penis, Protagonist's Younger Sister as a Heroine, Only Younger Heroines, Protagonist's Full Sister as a Heroine, Group Sex of One Male and Several Females

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---
*View the full details at [pinovel.net/v2588](https://pinovel.net/v2588).*

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