---
title: "Dear Sister ~Mayu wa Onii-chan no Mono nan Dakara ne!!~"
description: "The secret hardcore sex-with-brother-loving imouto ADV game!  I vowed I would always protect my little sister. Who knew it would be me who got lured into her pa"
image: "https://t.vndb.org/cv/82/18582.jpg"
---

# Dear Sister ~Mayu wa Onii-chan no Mono nan Dakara ne!!~

![Dear Sister ~Mayu wa Onii-chan no Mono nan Dakara ne!!~](https://t.vndb.org/cv/82/18582.jpg)

**Alternative Title:** ディアシスター　～まゆはお兄ちゃんのモノなんだからねっ!!～

**Aliases:** Dear Sister -Mayu Is Oniichan's Object!!-

**Developer:** Sister Soft

**Release date:** Oct 31, 2013

**Platform:** Windows

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

**Rating:** 6.3/10 (48 votes)

## Description
The secret hardcore sex-with-brother-loving imouto ADV game!

I vowed I would always protect my little sister.
Who knew it would be me who got lured into her panties?
"Oniichan, make lottts of sex with me!" 

[From [DLsite English](http://www.dlsite.com/ecchi-eng/work/=/product_id/RE123789.html)]

## Characters
### Mayu (まゆ)
Mayu tempts her brother to cross the forbidden line together. They then spend their time trying to find places to have sex without being caught.

- **Gender:** Female
- **Hair:** Brown, Odango, Twin Tails, Shoulder-length
- **Eyes:** Brown
- **Clothes:** School Uniform, Pajamas, Miniskirt, Thigh-high Stockings, Tank Top, Blouse, Short Shorts, Bun Covers
- **Role:** Full Sister, Younger Sister

## Shops
- [Official Website](http://www.sistersoft.net/products/dearsister/)
- [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ123789.html)

## Releases
### Japanese
- **2013-10-31**: Dear Sister ~Mayu wa Onii-chan no Mono nan Dakara ne!!~ Download Edition - [Official website](http://www.sistersoft.net/products/dearsister/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=19896), [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ123789.html)
- **2013-11-08**: Dear Sister ~Mayu wa Onii-chan no Mono nan Dakara ne!!~ First Press Limited Edition - [Official website](http://www.sistersoft.net/products/dearsister/)

### Chinese (simplified)
- **2017-01-27**: Dear Sister Zhenyou shi zhi Shuyu Gege de Dongxi o!! - [Official website](http://bbs.seikuu.com/thread-158551-1-1.html)

## Tags
ADV, High School, Blood-related Brother/Sister Incest, Imouto-type Heroine, Male Protagonist, Single Ending, Deredere Heroine, Nukige, Only a Single Heroine, High Sexual Content, Student Heroine, Student Protagonist, Hidden Vibrator, Defloration, Only Virgin Heroines, Twin Tail Heroine, Cunnilingus, Only Protagonist's Sisters as Heroine(s), Bathroom Sex, Only Younger Heroines, Sex with Protagonist Only, Only Blood-related Heroines, Protagonist's Younger Sister as a Heroine, Protagonist's Full Sister as a Heroine

## More Games from Sister Soft
- [Dear Sister ~Mayu wa Onii-chan no Mono nan Dakara ne!!~](https://pinovel.net/v14003)
- [Reika no Yakata ~Saimin Yuugi e no Shoutaijou~](https://pinovel.net/v14648)

---
*View the full details at [pinovel.net/v14003](https://pinovel.net/v14003).*

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