---
title: "One Love ~Yoru no Boku wa Ecchi na Onee-chan no Omocha ni Naru~"
description: "Yuu has just started his sophomore year but his cousin, Rin, suddenly comes to his school to work as a trainee teacher. Since they haven't seen each other for a"
image: "https://t.vndb.org/cv/80/74480.jpg"
---

# One Love ~Yoru no Boku wa Ecchi na Onee-chan no Omocha ni Naru~

![One Love ~Yoru no Boku wa Ecchi na Onee-chan no Omocha ni Naru~](https://t.vndb.org/cv/80/74480.jpg)

**Alternative Title:** おね恋 ～夜のぼくはエッチな従姉のおもちゃになる～

**Aliases:** おね恋（ラブ） ～夜のぼくはエッチな従姉（おねえちゃん）のおもちゃになる～

**Developer:** Mount Position

**Release date:** Aug 31, 2017

**Platform:** Windows

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

**Rating:** 6.6/10 (22 votes)

## Description
Yuu has just started his sophomore year but his cousin, Rin, suddenly comes to his school to work as a trainee teacher. Since they haven't seen each other for a long time and Rin has become quite beautiful, he starts to see her as a woman. However, she still treats him like a younger brother.

One day, he accidently picks up Rin's underwear and is discoverd by her. Surprisingly, she tells him that she would help him. And so, his erotic life guided by her begins.

[Translated from [Official Site](http://manposi.com/product/0074/story.htm)]

## Characters
### Nanami Yuu (七海 優)
- **Gender:** Male
- **Hair:** Brown, Short
- **Eyes:** Blue
- **Role:** Cousin, High School Student

### Nanami Rin (七海 凛)
- **Gender:** Female
- **Hair:** Black, Waist Length+, Twin Braids, Tiny Braid
- **Eyes:** Blue
- **Clothes:** Necktie, Ribbon Hair Tie
- **Role:** Cousin, University Student, Ane Act, Student Teacher
- **Subject of:** Androphobia
- **Voiced by:** Kazahana Mashiro

## Shops
- [Official Website](http://manposi.com/product/0074/index.htm)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ011309.html)

## Releases
### Japanese
- **2017-08-31**: One Love ~Yoru no Boku wa Ecchi na Onee-chan no Omocha ni Naru~ Package Edition - [Official website](http://manposi.com/product/0074/index.htm), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=25484)
- **2017-08-31**: One Love ~Yoru no Boku wa Ecchi na Onee-chan no Omocha ni Naru~ Download Edition - [Official website](http://manposi.com/product/0074/index.htm), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=25484), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ011309.html), [Gyutto](https://gyutto.com/i/item192775), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0159775/), [DL.Getchu](http://dl.getchu.com/i/item4002361), [DMM](https://dlsoft.dmm.co.jp/detail/aquras_0107/)

### Chinese (simplified)
- **2024-03-05**: Jie Lian ~Yewan Wo Chengwei Biaojie de Wanju~

## Tags
ADV, Oneesan-type Heroine, Male Protagonist, Teacher Heroine, Only a Single Heroine, Early Sexual Content, Cousin Incest, Cousin Romance, Protagonist's Cousin as a Heroine, Under the Same Roof, Unlockable Routes, Childhood Promise, Defloration, Only Virgin Heroines, High School Student Protagonist, Sexual Fantasizing, Only Older Heroines, Only Protagonist's Relatives as Heroine(s)

## More Games from Mount Position
- [Icha Love Dousei Seikatsu -Osananajimi to Asa kara Ban made Icha Icha Icha Icha-](https://pinovel.net/v21302)
- [One Love ~Yoru no Boku wa Ecchi na Onee-chan no Omocha ni Naru~](https://pinovel.net/v21394)
- [Mai x Mai? Sunao ni Narenai Imouto-tachi to no Ecchi na Kyoudou Seikatsu](https://pinovel.net/v23138)
- [Ama Imo! Amaenbou de Guutara na Imouto no Ecchi na Yuuwaku](https://pinovel.net/v23754)

---
*View the full details at [pinovel.net/v21394](https://pinovel.net/v21394).*

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```