---
title: "Mama Sis ~Okaa-san to Watashi, Docchi ga Ii no?~"
description: "The hero's father owns an inn named YAYOI. His mother has died ten years prior. Mirei Yasoshima, a friend of the hero's father comes over to take care of the he"
image: "https://t.vndb.org/cv/20/42420.jpg"
---

# Mama Sis ~Okaa-san to Watashi, Docchi ga Ii no?~

![Mama Sis ~Okaa-san to Watashi, Docchi ga Ii no?~](https://t.vndb.org/cv/20/42420.jpg)

**Alternative Title:** まましす 〜お母さんとわたし、どっちがいいの?〜

**Aliases:** Mamasis, Mamasisu, Mamashisu

**Developer:** bootUP!

**Release date:** Sep 25, 2020

**Platform:** Windows, DVD

**Language:** Japanese, English

**Rating:** 7.8/10 (82 votes)

## Description
The hero's father owns an inn named YAYOI. His mother has died ten years prior. Mirei Yasoshima, a friend of the hero's father comes over to take care of the hero. Sometimes she will bring her two daughters with her, and the group has fun together as he grows up. One day, someone wonders who is a better lover: Mirei or one of her daughters. They ask the hero to help decide. 
[Summarized from Getchu]

## Characters
### Fuyutsuki Yuuma (冬月 雄馬)
The protagonist of the story. His mother Yayoi died 10 years ago, his father Yudai fell into a severe depression, before disappearing, he left Mirei in charge of his upbringing and care. Over the years, Yuuma treated Mirei as his real mother and his childhood friends, Misa and Miu as his sisters. However, he did not know that the three beautiful ladies want to love him as a man and have a lot of sex with him.

- **Gender:** Male
- **Alias:** Yuu-kun
- **Hair:** Black, Short, Straight, Spiky Bangs
- **Body:** Teen, Slim, Pale
- **Personality:** Donkan
- **Eyes:** Hidden
- **Role:** Husband, Boyfriend, Childhood Friend, Senpai, Non-blood-related Son, Popular, Twelfth Grader

### Yasoshima Mirei (八十島 美玲)
A woman who manages and operates the YAYOI Inn.
She was married and has two daughters Misa and Miu. Formerly a full-time housewife, her husband passed away in a car accident at work 10 years ago, and started working at YAYOI Inn.

There, she met Yuuma's parents, who ran the YAYOI Inn, and became a good friend, but Yayoi (Yuuma's Mother) died of illness. Yudai (Yuuma's father) entrusted her with the management of the inn and the care of their son, Yuuma.

Mirei is a gentle, motherly and caring woman, she is cheerful and has a strong core, and while running YAYOI Inn, she takes care of her two daughters and her beloved Yuuma.

"Ufufu, Yuuma-kun, do you want to play with my boobs again?. Tell me if you want to drink my breast milk."

- **Gender:** Female
- **Measurements:** Height: 160cm, Bust-Waist-Hips: 110-63-94cm, I cup
- **Hair:** Brown, Short, Straight
- **Body:** Slim, Pale, Young-adult, Huge Breasts
- **Eyes:** Green, Tareme
- **Clothes:** Apron, Maid's Dress, Tank Top, Bikini, Baby-doll, Transparent, Maid's Headdress, Nightgown, Torn Pantyhose (damaged), Crotchless Panties, Sleeveless Turtleneck Sweater
- **Personality:** Deredere, Low Self-esteem, Kind, Mature, Baby Complex
- **Role:** Widow, Mother, Domestic Partner, Inn Manager
- **Subject of:** Pregnancy
- **Engages in:** Lactation
- **Voiced by:** Yuika

### Yasoshima Misa (八十島 美沙)
Mirei's first daughter and Miu's older sister. Graduated from Saragakuen Highschool in the last spring and entered a private Amano University.

With a gentle and unfussy personality. She is kind and caring for her mother, Mirei, and while supporting her, who runs the inn, she takes care of her younger sister, Miu. Misa loves Yuuma with all her heart and really wants to be his wife and bear his children.

"Yuu-kun, I can take the place of my mom, so... let me know if you want to have sex with me."

- **Gender:** Female
- **Measurements:** Height: 161cm, Bust-Waist-Hips: 92-58-86cm, G cup
- **Hair:** Black, Waist Length+, Straight
- **Body:** Pale, Young-adult, Inverted Nipples, Huge Breasts
- **Clothes:** School Uniform, T-shirt, Bodystocking, Nightgown, Sleeveless Dress, One Piece Bikini
- **Eyes:** Green
- **Personality:** Deredere, Relaxed, Kind, Mature, Baby Complex
- **Role:** Mother, Daughter, Full Sister, Older Sister
- **Subject of:** Pregnancy
- **Engages in:** Shopping, Lactation
- **Voiced by:** Hiiragi Nana

### Yasoshima Miu (八十島 美羽)
Mirei's second daughter and Misa's younger sister. Miu is a second-grader at a private school, she is one grade below Yuuma in their highschool.

With a  cheerful and positive personality, which is the exact opposite of Misa, a quiet and gentle sister. She's a laid back type that doesn't care about the details, but it also has a troublesome side and tends to put things off when it's unpleasant. Miu is a member of the badminton club at the school and has been a regular since the first year. By the way, she has a special move called Lightning Smash (self-proclaimed).

Because of her cheerful and frank personality, she is popular not only with boys but also with girls as a mood maker in her class.

Unlike Misa, a quiet and serious honor student type sister, she spends her days freely and freely, but her roots are lonely and spoiled. Miu has always trusted and relied on Misa, who is her sister and best friend. 

Miu masturbates frequently as she imagines having sex with Yuuma, the love of her life. Her dream is to receive creampies from Yuuma every day.

"It's crazy to just have sex with my sister and mom. So, have sex with me, right?. You can give me creampies whenever you want"

- **Gender:** Female
- **Measurements:** Height: 158cm, Bust-Waist-Hips: 85-54-95cm, F cup
- **Hair:** Brown, Ahoge, Shoulder-length, Straight
- **Body:** Teen, Pale, Big Breasts
- **Eyes:** Green
- **Personality:** Deredere, Energetic, Mischievous, Closet Pervert, Baby Complex, Loud
- **Role:** Mother, Daughter, Full Sister, High School Student, Younger Sister, Eleventh Grader, Imouto Act
- **Subject of:** Pregnancy
- **Clothes:** Tank Top, Bikini, Nurse Uniform, Hairpin, Spats, Nurse's Cap, Nightgown, Over The Knee Socks, Sailor School Uniform, Short Shorts, Tennis Outfit
- **Engages in:** Lactation, Badminton
- **Voiced by:** Yuzuhara Miu

## Shops
- [Official Website](http://www.bootup.jp/products/mamasis/index.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=1093001)

## Releases
### Japanese
- **2020-07-31**: Mama Sis ~Okaa-san to Watashi, Docchi ga Ii no?~ Trial Edition - [Official website](http://www.bootup.jp/products/mamasis/special.html)
- **2020-09-25**: Mama Sis ~Okaa-san to Watashi, Docchi ga Ii no?~ Package Edition - [Official website](http://www.bootup.jp/products/mamasis/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=29604), [Melonbooks.co.jp](https://www.melonbooks.co.jp/detail/detail.php?product_id=675410), [Getchu](http://www.getchu.com/soft.phtml?id=1093001), [DMM](https://www.dmm.co.jp/mono/pcgame/-/detail/=/cid=1270apc13576/), [Toranoana](https://ec.toranoana.shop/tora/ec/item/210006613988/)
- **2020-09-25**: Mama Sis ~Okaa-san to Watashi, Docchi ga Ii no?~ Download Edition - [Official website](http://www.bootup.jp/products/mamasis/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=29604), [DMM](https://dlsoft.dmm.co.jp/detail/russ_0322/)
- **2020-09-25**: Mama Sis Tsuika DLC - Cosplay Tengoku 5 - [Official website](http://www.bootup.jp/products/mamasis/yoyaku.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=29604), [DMM](https://dlsoft.dmm.co.jp/detail/russ_0323/)
- **2021-03-18**: Mama Sis ~Okaa-san to Watashi, Docchi ga Ii no?~ DVDPG - [Official website](http://www.n43project.com/n43/npg389/index.html)

### English
- **2022**: Mama Sis ~Okaa-san to Watashi, Docchi ga Ii no?~ - [Official website](https://sugoivisualnovel.up.railway.app/vns/28540)

## Tags
ADV, Romance, Imouto-type Heroine, Oneesan-type Heroine, Multiple Endings, Deredere Heroine, Protagonist's Childhood Friend as a Heroine, Nukige, Group Sex of One Male and Several Females, Early Sexual Content, Pregnant Sex, Harem Ending, Adult Heroine, Donkan Protagonist, Love Overcomes All, Widow Heroine, Other Perspectives, Flashback, Sex in Public Places, Missionary Position, Impregnation, Lactation During Sex, Only Good Endings, Cunnilingus, Romancing a Family, Doggy Style, Armpit Sex, Female Ejaculation, Outdoor Sex, Naked Sprites, Cowgirl, Bleep Censor, Defloration During Common Route, Shimaidon Ending, Oyakodon Ending, Standing Sex, Sitting Sex, Spoons, Piledriver, Protagonist as the Only Male, Drunk Sex, Mischievous Heroine, Heroine's Mother as a Heroine, Heroine with Children, Quickie Fix Position, Boobs on Glass, Hero(ine) Selection, Blowjob Duck Face, Perverted Heroine, Armpit Licking, Heroine with Inverted Nipples, Visible Cervix Penetration, Heroine with Baby Complex, Unlockable Gallery, Adult Breast Sucking, Milking (Sexual), Nursing Handjob, Children Ending, Pregnancy Good Ending, Single Boobjob, Single Blowjob, Pissing, Non-twin Heroine Sisters, High School Student Heroine, Sex with Protagonist Only, Heroine with Huge Breasts, Heroine with Big Breasts, Oyakodon

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- [Mitsu Ane](https://pinovel.net/v26056)
- [Mama Sis ~Okaa-san to Watashi, Docchi ga Ii no?~](https://pinovel.net/v28540)
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---
*View the full details at [pinovel.net/v28540](https://pinovel.net/v28540).*

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