---
title: "Onii-chan ni wa Zettai Ienai Taisetsu na Koto."
description: "\"Hey, Onii-chan. Let's make our dream come true, no matter what.\"  With those words, my younger sister smiles happily beside me. Beneath a winter sky that sting"
image: "https://t.vndb.org/cv/62/140762.jpg"
---

# Onii-chan ni wa Zettai Ienai Taisetsu na Koto.

![Onii-chan ni wa Zettai Ienai Taisetsu na Koto.](https://t.vndb.org/cv/62/140762.jpg)

**Alternative Title:** お兄ちゃんにはぜったい言えないたいせつなこと。

**Aliases:** onitai, onitaitai

**Developer:** Mink EGO

**Release date:** Jan 11, 2013

**Platform:** Windows

**Language:** Japanese

**Rating:** 7.3/10 (101 votes)

## Description
"Hey, Onii-chan. Let's make our dream come true, no matter what."

With those words, my younger sister smiles happily beside me.
Beneath a winter sky that stings the skin. Our breath comes out white, yet huddled close together, we're warm to the point of ticklishness.
Today as well, we speak of tomorrow as if it were a continuation of yesterday, weaving our shared dream.
It was a child's dream, almost like playing house.
But for us, it was a dream more precious than anything else, irreplaceable.

"A playwright brother and an actress sister. Right now we're still like fledglings, but someday we're going to create the most wonderful work in the world."

Bound by such a dream, we grew up together.

With that bond in our hearts, my younger sister and I walked this path together.
And so.
Before I knew it... the distant dream had drawn close enough that it was no longer just a dream.
Before I knew it... I had fallen in love with my younger sister.

A happy today that felt like a continuation of yesterday. A blissful tomorrow that felt like a continuation of today.
I thought that happiness would continue forever.
I thought it would continue, forever and ever───

[From [Gecthu](https://www.getchu.com/item/756605/)]

## Characters
### Kashiwabara Yukito (柏原 幸人)
- **Gender:** Male
- **Hair:** Black, Ahoge
- **Personality:** Hard Worker, Boku, Sister Complex
- **Eyes:** Blue
- **Clothes:** Glasses, Jacket, Turtleneck Shirt
- **Engages in:** Drinking, Elopement, Turndown
- **Role:** Husband, Father, Writer, Non-blood-related Brother, University Student, Ex-boyfriend, Secret Boyfriend
- **Subject of:** Psychological Trauma, Netori (their SO is stolen)

### Busujima Rokurou (毒島 禄郎)
Age: 50+

- **Gender:** Male
- **Hair:** Black, Wavy, Chest Hair, Leg Hair, Arm Hair
- **Body:** Adult, Overweight, Ugly, Large Penis
- **Clothes:** Suit, Glasses, Necklace, Vest, Ring, Briefs
- **Personality:** Pretending, Arrogant, Rude, Womanizer, Violent, Washi, Sloppy
- **Engages in:** Smoking, Blackmail, Netori (steals the SO)
- **Role:** Boyfriend, Wealthy, Coach, Sex Friend, Film Director
- **Eyes:** Pink, Hosome
- **Voiced by:** Suzuki Juutarou

### Kashiwabara Asuna (柏原 明日奈)
- **Gender:** Female
- **Measurements:** Height: 158cm, F cup
- **Hair:** Black, Waist Length+, Hair Loopies, Braided Bun
- **Body:** Teen, Slim, Pale, Big Breasts
- **Clothes:** School Uniform, Coat, Dress, Kimono, Scarf, Necktie, Shirt, T-shirt, Wristband, Thigh-high Stockings, Bikini, Towel, Ribbon Hair Tie, Spats, Pleated Skirt, Loafers, Sling Bikini, Crotchless One Piece Swimsuit
- **Subject of:** Split Personality, Pregnancy, Being Drugged, Sexual Corruption, Erotic Photography, Netorare (they are the stolen SO)
- **Role:** Wife, Mother, Daughter, Girlfriend, Rival, Non-blood-related Sister, High School Student, Actor, Model, Secret Girlfriend
- **Personality:** Naive, Brother Complex, Watashi
- **Eyes:** Garnet, Tareme
- **Engages in:** Elopement
- **Voiced by:** Asaka Natsu

### Kashiwabara Nanako (柏原 奈々子)
Age: late 30s

- **Gender:** Female
- **Measurements:** Height: 160cm, Weight: 55kg, H cup
- **Hair:** Brown, Long, Wavy, Curtained
- **Body:** Slim, Pale, Young-adult, Big Breasts
- **Eyes:** Violet
- **Clothes:** Skirt, Thigh-high Stockings, Nurse Uniform, Watch, Naked Apron, Wedding Ring, Nurse's Cap
- **Role:** Widow, Mother, Nurse, Non-blood-related Mother
- **Subject of:** Pregnancy, Sexual Corruption
- **Personality:** Kind, Watashi
- **Engages in:** Lactation
- **Voiced by:** Nonomura Saya

### Kotohira Kaho (琴平 歌穂)
Age: early 20s

- **Gender:** Female
- **Measurements:** Height: 165cm, Weight: 54kg, D cup
- **Hair:** Brown, Short
- **Eyes:** Brown, Tareme
- **Body:** Slim, Young-adult, Medium Breasts
- **Clothes:** Earrings, Vest, Jeans, Belt, Tank Top, Bracelet, Leggings
- **Engages in:** Drinking, Smoking
- **Subject of:** Blackmail, Turndown, Sexual Corruption
- **Role:** Childhood Friend, Rival, University Student, Actor, Sex Friend
- **Personality:** Atashi
- **Voiced by:** Aikawa Nana

### Mitarai Kazuma (御手洗 カズマ)
- **Gender:** Male
- **Alias:** KAZUMA
- **Hair:** Black, Short
- **Eyes:** Blue
- **Clothes:** Suit, Earrings, Necklace, Belt
- **Personality:** Boku, Ore, Narcissist, Rude, Womanizer, Violent
- **Role:** Idol, Actor, Popular, Singer
- **Engages in:** Seduction, Drugging
- **Voiced by:** Hyuuga Haruto

## Shops
- [Official Website](http://www.mink.co.jp/product/fbm/)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ013262.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=1032309)

## Releases
### Japanese
- **2013-01-11**: Onii-chan ni wa Zettai Ienai Taisetsu na Koto. - First Press Limited Edition - [Official website](http://www.mink.co.jp/ego/onitai/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=17789), [Getchu](http://www.getchu.com/soft.phtml?id=756605), [DMM](https://www.dmm.co.jp/mono/pcgame/-/detail/=/cid=1776apc10322/)
- **2013-01-11**: Onii-chan ni wa Zettai Ienai Taisetsu na Koto. - Download Edition - [Official website](http://www.mink.co.jp/ego/onitai/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=17789), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ007522.html), [Gyutto](https://gyutto.com/i/item97696), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0078080/), [DL.Getchu](http://dl.getchu.com/i/item1004193), [DMM](https://dlsoft.dmm.co.jp/detail/ggs_0798/)
- **2013-01-23**: Onii-chan ni wa Zettai Ienai Taisetsu na Koto. - Regular Edition - [Official website](http://www.mink.co.jp/ego/onitai/), [Getchu](http://www.getchu.com/soft.phtml?id=762819)
- **2016-08-01**: Mink EGO Complete Pack - [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ010339.html), [Gyutto](https://gyutto.com/i/item171655), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0141604/), [DL.Getchu](http://dl.getchu.com/i/item1005606), [DMM](https://dlsoft.dmm.co.jp/detail/ggs_1046pack/)
- **2016-08-02**: Mink Teiban Ninki Saku Complete Pack - [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ010341.html), [Getchu](http://www.getchu.com/soft.phtml?id=920436), [DL.Getchu](http://dl.getchu.com/i/item1005608)
- **2019-02-22**: Mink Final Best Memorial Pack - Package Edition - [Official website](http://www.mink.co.jp/product/fbm/), [Getchu](http://www.getchu.com/soft.phtml?id=1032309)
- **2019-11-29**: Mink Final Best Memorial Pack - Download Edition - [Official website](http://www.mink.co.jp/product/fbm/), [DMM](https://dlsoft.dmm.co.jp/detail/views_0657pack/)
- **2020-02-28**: Okazu no Tame no Scene Kanshou Hitozuma Hen Vol. 2 - [Official website](http://www.mink.co.jp/product/okazu/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=29170), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ013262.html), [Gyutto](https://gyutto.com/i/item228845), [DMM](https://dlsoft.dmm.co.jp/detail/minkm_0067/)

## Tags
Sexual Content, ADV, Imouto-type Heroine, Unavoidable Rape, High Sexual Content, Pregnant Sex, Heroine with Zettai Ryouiki, Adult Heroine, Narrating Others' Thoughts, Widow Heroine, Branching Plot, Other Perspectives, Nurse Heroine, Blackmail, Protagonist with a Face, Condoms, Side Portraits, Missionary Position, Sounds of Copulation, Internal Exhibition of Sex, Impregnation, Lactation During Sex, Intercrural Sex, Naked Heroine with Apron, Erotic Spanking, Actress Heroine, Outdoor Sex, Colored Texts, Colored Name-tags, Naked Sprites, Clothed Male Naked Female, Drunk Sex, Bathroom Sex, Heroine's Mother as a Heroine, Highly Animated Sprites, Quickie Fix Position, Boobs on Glass, Pantyjob, Adult Breast Sucking, Choices from Other Perspectives, High School Student Heroine, Oyakodon, Casting Couch, Standing Sex, Rape, Cunnilingus, Doggy Style, Discreet Sex, Reverse Cowgirl, Only One Good Ending, Pissing on Others, Sex in Water, Discreet Phone Sex, Spoons, Sex on a Beach, Vaginal Fingering, Protagonist with Ahoge, Protagonist's Non-blood-related Sister as a Heroine, Siscon Protagonist, Protagonist's Younger Sister as a Heroine, Anal Sex, Reverse Piledriver, Non-blood-related Brother/Sister Incest, Sex in a Vehicle, Single Handjob, Single Blowjob, Deepthroat, Single Boobjob, Pregnancy, Heroine with Swimsuits, Heroine with Crotchless Clothing, Female Ejaculation, Defloration, Sex in Front of an Audience, Mindbreak, Rape with Blackmail, Group Sex of One Male and Several Females, Rape under Influence, Butterfly, Heroine Having Sex with Others, Netorare, Rape by Deception, Male Protagonist, Multiple Endings, Nukige, Early Sexual Content, Protagonist with Glasses, Cowgirl, Sitting Sex, Piledriver, Sex on Toilet, Protagonist's Non-blood-related Mother as a Heroine, Brocon Heroine, Winter

## More Games from Mink EGO
- [Onii-chan ni wa Zettai Ienai Taisetsu na Koto.](https://pinovel.net/v11559)
- [Imouto Dakara Dekiru Koto, Imouto Janai to Dame na Koto.](https://pinovel.net/v12432)
- [Boku no Itoshii Imouto ga Netorarechatta Wake](https://pinovel.net/v15276)
- [Mahou Shoujo no Ani ~Heta na Uso to Furyou Shounen~](https://pinovel.net/v16721)
- [Toumei Ningen - Iregui Chuuzou](https://pinovel.net/v21428)
- [Imouto ~Mitsutsubo: Dai Nishou~](https://pinovel.net/v21921)

---
*View the full details at [pinovel.net/v11559](https://pinovel.net/v11559).*

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