---
title: "Soushi Soumai ~Oya no Inu Aida ni...~"
description: "Maina is my little sister.  She's always been cute to me, but lately  she's so cute it's making me hurt.  Guys at school are falling over themselves  to try and"
image: "https://t.vndb.org/cv/81/11681.jpg"
---

# Soushi Soumai ~Oya no Inu Aida ni...~

![Soushi Soumai ~Oya no Inu Aida ni...~](https://t.vndb.org/cv/81/11681.jpg)

**Alternative Title:** 相思相妹～親の居ぬ間に…～

**Aliases:** Mutual Imoto - The Time Parents Aren't Home

**Developer:** SUZUYA

**Release date:** Jun 13, 2010

**Platform:** Windows

**Language:** Japanese

**Rating:** 6.6/10 (avg, 3 votes)

## Description
Maina is my little sister. 
She's always been cute to me, but lately 
she's so cute it's making me hurt. 
Guys at school are falling over themselves 
to try and win her. To steal her from me. 

Our parents are going on a 3-day vacation. 
The next 3 days, it's just us! 
Maina is all mine. 

[From [DLsite English](https://www.dlsite.com/ecchi-eng/work/=/product_id/RE068333.html)

## Characters
### Aikawa Souji (相川 惚司)
- **Gender:** Male
- **Role:** Older Brother

### Aikawa Maina (相川 妹菜)
- **Gender:** Female
- **Hair:** Black, Brown, Shoulder-length
- **Clothes:** Swimsuit, Unusual Hair Ornaments, Shimapan
- **Body:** Small Breast Sizes
- **Role:** Younger Sister
- **Voiced by:** Himari

## Shops
- [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ068333.html)

## Releases
### Japanese
- **2010-06-13**: Soushi Soumai ~Oya no Inu Aida ni...~ - [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ063400.html)
- **2010-06-13**: Soushi Soumai ~Oya no Inu Aida ni...~ Trial Edition - [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ063400.html)
- **2010-10-10**: Soushi Soumai ~Oya no Inu Aida ni...~ With Erotic Voice - [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ068333.html)
- **2010-10-10**: Soushi Soumai ~Oya no Inu Aida ni...~ With Erotic Voice - Trial Edition

## Tags
Male Protagonist, Nukige, Kinetic Novel, Vibrators, Defloration, Only Virgin Heroines, Cunnilingus, Naked Sprites, Bathroom Sex, Handcuffed Sex, Pissing, Sex Involving Food, Vaginal Fingering, Protagonist's Younger Sister as a Heroine, Unoriginal Graphics, Only a Single Heroine

## More Games from SUZUYA
- [Soushi Soumai ~Oya no Inu Aida ni...~](https://pinovel.net/v9229)
- [Oba Shibori](https://pinovel.net/v9230)
- [Datsubo ~Mi mo Kokoro mo~](https://pinovel.net/v9228)
- [Inbo Mansion ~Mama wa, Seishori Niku Benki~](https://pinovel.net/v9231)
- [Bikini Rape ~Hiyake JK, Hakudaku Koubi~](https://pinovel.net/v9232)
- [8 Nin no Ane Tsuma ~Ane Tsuma wa, Otouto Chi*po de Choukyouzumi~](https://pinovel.net/v17269)
- [Inbo Mansion 2 ~Mama no Shikyuu wa, Seieki Benki~](https://pinovel.net/v17266)
- [Hitozuma Jokyoushi ~Innyuu × Niku Ana Shidou~](https://pinovel.net/v17267)
- [Ero Kouchou ~Seifuku Bishoujo x Chi◎po Shidou~](https://pinovel.net/v17302)
- [Ero Kouchou 2 ~Moshimo Gakuen no Zen Joseito ga, Kouchou no Kanojo Dattara~](https://pinovel.net/v17303)
- [Inbo Nurse ~Mesuana Inbo wa, Musuko Sen'you Seieki Benki~](https://pinovel.net/v24523)
- [Yoru no Inbo Nurse ~Mesuana Inbo wa, Ai Suru Musuko no Tsuma ni Naru~](https://pinovel.net/v24847)

---
*View the full details at [pinovel.net/v9229](https://pinovel.net/v9229).*

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