---
title: "Osu to Mesu no Kankei ~Cool na Imouto to Atsukurushii Ore no Ano Natsu~"
description: "As I was living by myself while attending university, my younger sister came to visit. Due to family circumstances, she would be living with me for a while. It "
image: "https://t.vndb.org/cv/55/90755.jpg"
---

# Osu to Mesu no Kankei ~Cool na Imouto to Atsukurushii Ore no Ano Natsu~

![Osu to Mesu no Kankei ~Cool na Imouto to Atsukurushii Ore no Ano Natsu~](https://t.vndb.org/cv/55/90755.jpg)

**Alternative Title:** オスとメスのカンケイ　～クールな妹と暑苦しい俺のあの夏～

**Developer:** X-BangBang

**Release date:** Aug 17, 2014

**Platform:** Windows

**Language:** Japanese

**Rating:** 4.3/10 (avg, 3 votes)

## Description
As I was living by myself while attending university, my younger sister came to visit. Due to family circumstances, she would be living with me for a while.
It had been years since we last met, and she seemed far more grown up than as I remembered her.

This kind of feeling...

## Characters
### Rei (冷衣)
- **Gender:** Female
- **Hair:** Blond, Waist Length+
- **Body:** Teen, Slim, Pale, Small Breasts
- **Eyes:** Blue
- **Clothes:** Thigh-high Stockings, Sailor School Uniform, Ribbon Headband
- **Role:** Younger Sister
- **Voiced by:** Shiina Amane

## Shops
- [Official Website](http://bang2.sakura.ne.jp/osutomesu/main.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=824330)

## Releases
### Japanese
- **2014-08-17**: Osu to Mesu no Kankei ~Cool na Imouto to Atsukurushii Ore no Ano Natsu~ Package Edition - [Official website](http://bang2.sakura.ne.jp/osutomesu/main.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=20990), [Melonbooks.co.jp](https://www.melonbooks.co.jp/detail/detail.php?product_id=37162), [Getchu](http://www.getchu.com/soft.phtml?id=824330), [Toranoana](https://ec.toranoana.shop/tora/ec/item/040030231835/)

## Tags
ADV, Male Protagonist, Multiple Endings, Heroine with Zettai Ryouiki, Defloration, Intercrural Sex, Cunnilingus, Outdoor Sex, Few Choices, Naked Sprites, Only Protagonist's Sisters as Heroine(s), Censored Text, Facesitting, Discreet Phone Sex, Only Younger Heroines, Rope Bondage, Single Footjob, Single Handjob, Vaginal Masturbation, Straight Lolicon, Sex with Protagonist Only, Only Blood-related Heroines, Only a Single Heroine

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---
*View the full details at [pinovel.net/v22858](https://pinovel.net/v22858).*

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