---
title: "Onemuri Sister"
description: "The male protagonist suffers from 'unhealthy interest' for his adoptive little sister and starts 'playing' with her body during her sleep. Who needs to know the"
image: "https://t.vndb.org/cv/97/129197.jpg"
---

# Onemuri Sister

![Onemuri Sister](https://t.vndb.org/cv/97/129197.jpg)

**Alternative Title:** おねむりしすたー

**Aliases:** Sleeping Sister

**Developer:** Wanko Soft

**Release date:** Dec 10, 2004

**Platform:** Windows, DVD

**Language:** Japanese

**Rating:** 5.8/10 (7 votes)

## Description
The male protagonist suffers from 'unhealthy interest' for his adoptive little sister and starts 'playing' with her body during her sleep.
Who needs to know the rest?

## Characters
### Ooshima Kenji (大島 賢司)
- **Gender:** Male
- **Role:** Step Brother, Older Brother

### Ooshima Mai (大島 まい)
- **Gender:** Female
- **Hair:** Pink, Ahoge, Shoulder-length
- **Body:** Pale, Kid, Small Breasts
- **Eyes:** Violet
- **Role:** Step Sister, Younger Sister
- **Clothes:** Rubber Band With Beads, Sundress
- **Voiced by:** Yoshikawa Kana

## Shops
- [Official Website](https://web.archive.org/web/20120202103449/http://onemuri.yumesta.com/top.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=264565)

## Releases
### Japanese
- **2004-12-10**: Onemuri Sister - Package Edition - [Official website](https://web.archive.org/web/20120202103449/http://onemuri.yumesta.com/top.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=4349), [Getchu](http://www.getchu.com/soft.phtml?id=113641)
- **2005-02-01**: Onemuri Sister - Download Edition - [Official website](https://web.archive.org/web/20120202103449/http://onemuri.yumesta.com/top.html)
- **2006-06-08**: Ganbari Daughter & Onemuri Sister - DVDPG - [Official website](https://web.archive.org/web/20161210090125/http://www.eants.co.jp/game/yumesta/index.html), [Getchu](http://www.getchu.com/soft.phtml?id=264565)
- **2016-06-17**: Ganbari Daughter & Onemuri Sister - Download Edition - [DMM](https://dlsoft.dmm.co.jp/detail/bitterh_0015/)

## Tags
ADV, Non-blood-related Brother/Sister Incest, Romance, Male Protagonist, Linear Plot, Multiple Endings, Family Life Comedy, Nukige, Protagonist's Non-blood-related Sister as a Heroine, Only a Single Heroine, Early Sexual Content, Under the Same Roof, Student Protagonist, Anal Penetration, Footjob, Heroine with Ahoge, Only Loli Heroines, Sex with Sleepers, Only Protagonist's Sisters as Heroine(s), Naizuri, Only Younger Heroines, Sex Involving Children, Straight Lolicon, Anal Sex, Single Footjob, Protagonist's Younger Sister as a Heroine, Single Blowjob, Butterfly, Anal Fingering, Intercrural Sex, Doggy Style, Single Handjob, Sex on Toilet

## More Games from Wanko Soft
- [Onemuri Sister](https://pinovel.net/v3904)
- [Ganbari Daughter](https://pinovel.net/v3723)
- [Oshiete KissMe](https://pinovel.net/v10230)
- [Chibi Chibi Fiancee](https://pinovel.net/v2132)
- [Dark Elf Pregnant](https://pinovel.net/v2246)

---
*View the full details at [pinovel.net/v3904](https://pinovel.net/v3904).*

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```