---
title: "Kyonyuu Kazoku Saimin \"Kazoku Nan Dakara, Sex Suru no wa Atarimae yo ne......\""
description: "The protagonist - Yuuichi - fails the entrance exam and is currently attending prep school. Around this time, his father, who is almost never home, remarries an"
image: "https://t.vndb.org/cv/71/102271.jpg"
---

# Kyonyuu Kazoku Saimin "Kazoku Nan Dakara, Sex Suru no wa Atarimae yo ne......"

![Kyonyuu Kazoku Saimin "Kazoku Nan Dakara, Sex Suru no wa Atarimae yo ne......"](https://t.vndb.org/cv/71/102271.jpg)

**Alternative Title:** 巨乳家族催眠「家族なんだから、セックスするのは当たり前よね……」

**Developer:** Lune

**Release date:** Aug 30, 2013

**Platform:** Windows

**Language:** Japanese, English

**Rating:** 7.3/10 (229 votes)

## Description
The protagonist - Yuuichi - fails the entrance exam and is currently attending prep school.
Around this time, his father, who is almost never home, remarries and his family gains new members.

The mature and alluring mother - Mifuyu, her gyaru eldest daughter - Natsuki, and subdued second daughter - Akiha.
Yuuichi wants to welcome the new family, but living together with 3 women is too titillating.
Together with the stress of examinations, it becomes impossible to suppress his libido.

And then, a mysterious package arrives. Inside is a strange penlight that has the ability to put anyone under hypnosis.
But it can't make people do things that they don't want.
Thus, Yuuchi first begins with "getting along as a family", and gradually, the orders become more extreme.

Moreover, he wants the women to bear his child in order to become a real family.
Additionally, the mother daughters trio, filled with carnal desires, also begins to seek for more pleasure...

[Translated from [Official Site](http://marigold.1000.tv/lune/kazoku_saimin/story.html)]

## Characters
### Mamiya Yuuichi (間宮 雄一)
- **Gender:** Male
- **Measurements:** Height: 164cm
- **Hair:** Black, Short, Straight, Spiky Bangs
- **Body:** Slim, Pale, Young-adult, Large Penis
- **Eyes:** Hidden
- **Engages in:** Hypnotism, Blackmail, Netori (steals the SO)
- **Role:** Son, Nephew, Non-blood-related Brother, Nameable, Non-blood-related Son
- **Items:** Video Camera

### Hinohara Haruka (日野原 春珂)
- **Gender:** Female
- **Measurements:** Height: 171cm, Bust-Waist-Hips: 90-58-85cm
- **Hair:** Black, Waist Length+, Spiky Bangs, Sidehair
- **Body:** Pale, Young-adult, Body Painting, Big Breasts
- **Eyes:** Blue
- **Clothes:** Glasses, T-shirt, Miniskirt, Pantyhose, Collar, Lab Coat, Garter Belt Stockings, High Heels, Blouse, Bracelet, Leggings, Lace Lingerie, Open Cup Bra, Crotchless Panties
- **Subject of:** Hypnotism, Pregnancy
- **Role:** Aunt
- **Engages in:** Cosplay, Infidelity
- **Voiced by:** Momozono Kaoru

### Mamiya Akiha (間宮 秋葉)
- **Gender:** Female
- **Measurements:** Height: 156cm, Bust-Waist-Hips: 90-58-89cm
- **Hair:** Brown, Antenna, Twin Tails, Short, Intake, Blunt Bangs
- **Body:** Teen, Pale, Big Breast Sizes
- **Clothes:** School Uniform, Mini-dress, Headband, Sport Bloomers, Knee-high Socks, Swim Cap, Rubber Band With Beads, School Swimsuit, Shimapan, High Heeled Sandals, Sundress, Loafers
- **Eyes:** Blue
- **Subject of:** Hypnotism, Pregnancy
- **Role:** Daughter, Full Sister, Non-blood-related Sister, Younger Sister
- **Engages in:** Cosplay
- **Voiced by:** Konoe Yuzuko

### Mamiya Mifuyu (間宮 美冬)
- **Gender:** Female
- **Measurements:** Height: 164cm, Bust-Waist-Hips: 94-62-89cm
- **Hair:** Brown, Ahoge, Ponytail, Long, Curtained
- **Body:** Pale, Young-adult, Body Painting, Big Breasts
- **Clothes:** School Uniform, Sweater, Glasses, Skirt, Sport Bloomers, Pantyhose, Collar, Nurse Uniform, High Heels, Naked Apron, Pendant Necklace, Hair Tie, Wedding Ring, School Swimsuit, Nurse's Cap, Nightgown, Lace Lingerie, Open Cup Bra, Crotchless Panties
- **Eyes:** Violet
- **Subject of:** Hypnotism, Pregnancy
- **Role:** Mother, Not a Virgin, Non-blood-related Mother
- **Engages in:** Cosplay, Infidelity
- **Voiced by:** Nagahara Kyouko

### Mamiya Natsuki (間宮 夏希)
- **Gender:** Female
- **Measurements:** Height: 160cm, Bust-Waist-Hips: 89-56-88cm
- **Hair:** Blond, Ponytail, Waist Length+, Spiky Bangs, Sidehair
- **Body:** Pale, Young-adult, Big Breast Sizes
- **Clothes:** School Uniform, Sweater, Miniskirt, Knee-high Socks, Pantyhose, Belt, Tank Top, Nurse Uniform, Bracelet, Hair Tie, Nurse's Cap, Ankle Boots, Knee-high Boots, Short Shorts
- **Eyes:** Violet
- **Subject of:** Hypnotism, Pregnancy
- **Role:** Daughter, Full Sister, Non-blood-related Sister, Older Sister
- **Engages in:** Cosplay
- **Voiced by:** Tachibana Mao

## Shops
- [Official Website](http://www.lune-soft.jp/game/19124)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ014497.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=1061975)

## Releases
### Japanese
- **2013-07-31**: Kyonyuu Kazoku Saimin "Kazoku Nan Dakara, Sex Suru no wa Atarimae yo ne......" - Trial Edtion - [Official website](http://www.lune-soft.jp/game/12423)
- **2013-08-30**: Kyonyuu Kazoku Saimin "Kazoku Nan Dakara, Sex Suru no wa Atarimae yo ne......" - Package Edition - [Official website](https://www.lune-soft.jp/game/12423), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=19189), [DMM](https://www.dmm.co.jp/mono/pcgame/-/detail/=/cid=623mggw0178/)
- **2014-02-28**: Kyonyuu Kazoku Saimin "Kazoku Nan Dakara, Sex Suru no wa Atarimae yo ne......" - Download Edition - [Official website](https://www.lune-soft.jp/game/12423), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ008382.html), [Gyutto](https://gyutto.com/i/item181875), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0150061/), [DL.Getchu](http://dl.getchu.com/i/item1005745), [DMM](https://dlsoft.dmm.co.jp/detail/mgold_0079/)
- **2017-06-30**: Kyonyuu Kazoku - Low Price Edition - [Official website](http://www.lune-soft.jp/game/12423)
- **2019-11-29**: LuneSoft Premium Pack 4 ~Konna ni Irechatte, Dou Suru no yo!?~ Package Edition - [Official website](http://www.lune-soft.jp/game/19124), [Getchu](http://www.getchu.com/soft.phtml?id=1061975), [DMM](https://www.dmm.co.jp/mono/pcgame/-/detail/=/cid=623mggw0229/)
- **2019-11-29**: LuneSoft Premium Pack 4 ~Konna ni Irechatte, Dou Suru no yo!?~ Download Edition - [Official website](http://www.lune-soft.jp/game/19124), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ014497.html), [DMM](https://dlsoft.dmm.co.jp/detail/mgold_0158pack/)

### English
- **2023-03-07**: Kyonyuu Kazoku Saimin "Kazoku Nan Dakara, Sex Suru no wa Atarimae yo ne......" - [Official website](https://sugoivisualnovel.up.railway.app/vns/12796)

## Tags
Superpowers, ADV, Non-blood-related Brother/Sister Incest, Imouto-type Heroine, Male Protagonist, Heroine with Glasses, Nameable Protagonist, Nukige, Family, Bondage, Protagonist's Non-blood-related Sister as a Heroine, High Sexual Content, Group Sex of One Male and Several Females, Student Heroine, Early Sexual Content, Pregnant Sex, Under the Same Roof, Harem Ending, Heroine with Sexual Experience, Adult Heroine, Netori, Married Heroine, Erotic Mind Control, Big Breast Sizes Heroine, Protagonist's Non-blood-related Mother as a Heroine, Non-blood-related Mother/Son Incest, Medical Doctor Heroine, Blackmail, Rape with Blackmail, Flashback, Ponytail Heroine, Urination Fetish, Defloration, Sex in Public Places, Anal Penetration, Boobjob, Cosplay, Sixty-nine, Sounds of Copulation, Blowjob, Handjob, Mind Control, Twin Blowjob, Impregnation, Lactation During Sex, Triple Blowjob, Heroine with Ahoge, Anilingus, Erotic Spanking, Only Good Endings, Cunnilingus, More Than Seven Endings, Romancing a Family, Enema, Doggy Style, Body Writing, Female Ejaculation, Ejaculation Choice, Infidelity, Naked Sprites, Petplay, Fingering, Read Text Marking, Cowgirl, Shimaidon Ending, Oyakodon Ending, Aunt/Nephew Incest, Sprite Viewer, Ahegao, Bathroom Sex, Ending Scene Recollection, Soapy Massage, Heroine with Children, Gokkun, Background Moans, Discreet Phone Sex, Heroine in Relationship with Other(s), Cum on Food, Armpit Licking, Music Recollection, Single Boobjob, Single Blowjob, Sex with Protagonist Only, Heroine with Big Breasts, In-law Incest, Shimaidon, Oyakodon

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---
*View the full details at [pinovel.net/v12796](https://pinovel.net/v12796).*

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