---
title: "Mariko-sanchi no Seijijou ~Oba-san wa Boku no Mono~"
description: "The main character is Takeru. His parents are now abroad and he temporarily lives at his uncle's house. His uncle rarely comes back home, but he enjoys his life"
image: "https://t.vndb.org/cv/34/31434.jpg"
---

# Mariko-sanchi no Seijijou ~Oba-san wa Boku no Mono~

![Mariko-sanchi no Seijijou ~Oba-san wa Boku no Mono~](https://t.vndb.org/cv/34/31434.jpg)

**Alternative Title:** 茉莉子さん家の性事情～伯母さんは僕のモノ～

**Developer:** Willow Soft

**Release date:** Mar 27, 2009

**Platform:** Windows, Android, DVD

**Language:** Japanese

**Rating:** 6.8/10 (34 votes)

## Description
The main character is Takeru. His parents are now abroad and he temporarily lives at his uncle's house. His uncle rarely comes back home, but he enjoys his life there with Mariko, his aunt, and Akine, her daughter. He, however, gradually falls in love with Mariko though he knows it is forbidden. One day, he accidentally sees Mariko masturbating. He can't control his libido anymore and finally sleeps with Mariko....

[From [ErogeShop](http://web.archive.org/web/20090227083253/http://www.erogeshop.com:80/product_info.php/products_id/1012107)]

## Characters
### Nirasawa Takeru (韮沢 武瑠)
- **Gender:** Male
- **Role:** Cousin, University Student

### Nirasawa Akine (韮沢 秋音)
- **Gender:** Female
- **Measurements:** Height: 173cm, Bust-Waist-Hips: 94-65-89cm
- **Birthday:** 29 May
- **Hair:** Red, Shoulder-length
- **Eyes:** Green, Tsurime
- **Body:** Young-adult
- **Personality:** Tsundere, Selfish, Arrogant, Rude, Stylish
- **Role:** Divorcee, Daughter, Cousin, Model, Pre-Story Virginity Loss to Protagonist
- **Clothes:** Tank Top, Bikini, Short Shorts
- **Engages in:** Lactation
- **Voiced by:** Momozono Kaoru

### Nirasawa Mariko (韮沢 茉莉子)
- **Gender:** Female
- **Measurements:** Height: 160cm, Bust-Waist-Hips: 92-72-90cm
- **Birthday:** 6 June
- **Hair:** Brown, Long, Parted to Side
- **Eyes:** Blue
- **Body:** Adult, Mole
- **Clothes:** Kimono, Skirt, One Piece Swimsuit, Garter Belt Stockings, Pendant Necklace, Clothing with Ribbons, Hair Tie, Wedding Ring
- **Role:** Mother, Aunt, Yamato Nadeshiko
- **Personality:** Kind, Mature, Docile, Wise, Closet Pervert
- **Engages in:** Infidelity
- **Voiced by:** Shion Miyabi

### Nirasawa Keichi (韮沢 啓一)
- **Gender:** Male
- **Hair:** Brown, Slicked Back
- **Clothes:** Trousers, Necktie, Shirt
- **Eyes:** Amber
- **Role:** Husband, Father, Uncle
- **Subject of:** Infidelity

## Shops
- [Official Website](http://www.willowsoft.biz/01_wi-pro/tsuma_set/index.html)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ010382.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=772662)

## Releases
### Japanese
- **2009-03-27**: Mariko-sanchi no Seijijou ~Oba-san wa Boku no Mono~ Limited Edition - [Official website](http://www.willowsoft.biz/01_wi-pro/tsuma_02/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=12004), [Getchu](http://www.getchu.com/soft.phtml?id=609385)
- **2009-09-25**: Mariko-sanchi no Seijijou ~Oba-san wa Boku no Mono~ Download Edition - [Official website](http://www.willowsoft.biz/01_wi-pro/tsuma_02/index.html), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ003963.html), [Gyutto](https://gyutto.com/i/item15921), [DL.Getchu](http://dl.getchu.com/i/item1001890), [DMM](https://dlsoft.dmm.co.jp/detail/digib_0012/)
- **2012-05-25**: Mariko-sanchi no Seijijou ~Oba Mariko Hen~ DVDPG - [Official website](https://web.archive.org/web/20180101033354/http://www.world-pg.com/2012_products/index.html), [Getchu](http://www.getchu.com/soft.phtml?id=740133)
- **2012-06-29**: Mariko-sanchi no Seijijou ~Onee-san Akine Hen~ DVDPG - [Official website](https://web.archive.org/web/20180101033354/http://www.world-pg.com/2012_products/index.html), [DMM](https://www.dmm.co.jp/mono/anime/-/detail/=/cid=cppg021/)
- **2013-07-26**: Haha Bako ~Willow Soft Complete Box~ - Package Edition - [Official website](http://www.willowsoft.biz/01_wi-pro/tsuma_set/index.html), [Getchu](http://www.getchu.com/soft.phtml?id=772662)
- **2014-09-19**: Mariko-sanchi no Seijijou ~Oba-san wa Boku no Mono~ - Android Edition - [Official website](http://www.willowsoft.biz/01_wi-pro/tsuma_02/index.html), [DLsite](https://www.dlsite.com/appx/work/=/product_id/VJ008715.html)
- **2016-07-15**: Haha Bako ~Willow Soft Complete Box~ - Download Edition - [Official website](http://www.willowsoft.biz/01_wi-pro/tsuma_set/index.html), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ010382.html), [Gyutto](https://gyutto.com/i/item173722), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0142456/), [DL.Getchu](http://dl.getchu.com/i/item1005619), [DMM](https://dlsoft.dmm.co.jp/detail/inheart_0014pack/)

## Tags
ADV, Oneesan-type Heroine, Male Protagonist, Multiple Endings, Female Protagonist for a Short Time, Pregnant Sex, Cousin Incest, Protagonist's Cousin as a Heroine, Under the Same Roof, Heroine with Sexual Experience, Adult Heroine, Netori, Married Heroine, Tsundere Heroine, Childishly Violent Heroine, Branching Plot, Summer, Heroine with Shorts, Heroine with Swimsuits, Lactation During Sex, Date Display, Divorcee Heroine, Protagonist's Aunt as a Heroine, Heroine with Kimono, Doggy Style, Aunt/Nephew Incest, Perverted Heroine, Sex with Protagonist Only, Nukige

## More Games from Willow Soft
- [Okaa-san wa Ore Sen'you! ~Anata no Hajimete o... Okaa-san ga Moratte A-ge-ru~](https://pinovel.net/v6623)
- [Mariko-sanchi no Seijijou ~Oba-san wa Boku no Mono~](https://pinovel.net/v6131)
- [Okaa-san ga Ippai!](https://pinovel.net/v3000)
- [Mamasen](https://pinovel.net/v5761)

---
*View the full details at [pinovel.net/v6131](https://pinovel.net/v6131).*

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