---
title: "Real Imouto ga Iru Ooizumi-kun no Baai"
description: "Ryou has played lots of eroge and loved lots of (2D) imoutos. However, one imouto has stolen his heart. Voiced by his favourite seiyuu and drawn by his favourit"
image: "https://t.vndb.org/cv/68/112268.jpg"
---

# Real Imouto ga Iru Ooizumi-kun no Baai

![Real Imouto ga Iru Ooizumi-kun no Baai](https://t.vndb.org/cv/68/112268.jpg)

**Alternative Title:** リアル妹がいる大泉くんのばあい

**Aliases:** Riaimo

**Developer:** ALcot Honey Comb

**Release date:** May 28, 2010

**Platform:** Windows

**Language:** English, Japanese, Korean, Chinese (simplified), Vietnamese

**Rating:** 7.3/10 (392 votes)

## Description
Ryou has played lots of eroge and loved lots of (2D) imoutos. However, one imouto has stolen his heart. Voiced by his favourite seiyuu and drawn by his favourite illustrator, Mai is not like his real imouto, Shiori, who treats him like garbage and sees him as nothing more than a disgusting eroge-playing maniac. No, Mai would take a bath with him, hold hands with him on the way to school... it’s totally different from reality. One night, Ryou had a strange dream. When he woke up in the morning, he found Mai straddling him... “Good morning, onii-chan!”

[From [Hau~ Omochikaeri!](https://omochikaeri.wordpress.com/2010/05/15/may-2010-eroge-releases/)]

## Characters
### Ooizumi Ryou (大泉 涼)
This game’s protagonist, brother of [url=/c458]Shiori[/url]. Has good looks with glasses but is actually a closet otaku. He only plays eroges that has imouto and especially like the one [url=/c459]Mai[/url] is in. He is a really timid and kind oniichan that tries hard to restore the family but if Shiori avoids him he wont give chase. He tries to carry everything by himself. He is also pretty good at sports and study, and has taught Shiori about basketball when they were small.

[Based on [url=http://whatistomato.wordpress.com/2010/06/10/riaimo-mini-review/]Warum's review[/url]]

- **Gender:** Male
- **Hair:** Brown, Short, Grey, Spiky
- **Body:** Teen, Pale
- **Clothes:** School Uniform, Glasses, Necktie, T-shirt, Gym Shorts
- **Personality:** Proactive, Otaku, Ore, Pervert, Reserved, Kind, Sister Complex, 2D Character Lover
- **Eyes:** Violet
- **Role:** Full Brother, Boyfriend, Friend, Classmate, Gamer, Popular, Older Brother, Part-time Worker, Shop Clerk, Secret Boyfriend, Eleventh Grader
- **Subject of:** Injury, Netorare (they are the stolen SO)
- **Engages in:** Unarmed Fighting, Basketball, Self-sacrifice, Netori (steals the SO), Long Distance Relationship

### Ooizumi Mai (大泉 麻衣)
The virtual, ideal, imouto that came out of the 2D world to be with Ryou. Mai is the innocent, sweet, sister that can take care of any housework with ease and yet be naturally clutzy in front of older brother. Has little knowledge in terms of sex which results in interesting curiosity-bound situations. Also has a complex with the size of her breasts. This mysterious bishoujo often makes Ryou question reality... and with good reasons…

[From [url=http://whatistomato.wordpress.com/2010/06/10/riaimo-mini-review/]Tomato Conspiracy[/url]]

- **Gender:** Female
- **Measurements:** Height: 156cm, Bust-Waist-Hips: 76-56-79cm
- **Birthday:** 6 September
- **Hair:** White, Ahoge, Shoulder-length, Sidehair
- **Body:** Teen, Slim, Pale, Small Breasts
- **Clothes:** Dress, Pajamas, Hair Ribbon, Thigh-high Stockings, Swimsuit, Ribbon Tie, Sailor School Uniform
- **Personality:** Deredere, Kind, Clumsy, Brother Complex, Dog Person
- **Role:** Rival, Classmate, Transfer Student, Secret Identity, Construct, Temporary Protagonist, Tenth Grader, Imouto Act
- **Eyes:** Garnet
- **Engages in:** Body Swap, Netori (steals the SO), Impersonation
- **Subject of:** Disappearance, Blessing, Forgotten
- **Voiced by:** Hikawa Megumi

### Ooizumi Shiori (大泉 栞)
This game’s main heroine. Plays basketball and joins the school team. Despises her [url=/c462]older brother[/url] that only plays eroge at home, and applies minimal/ignore routines to Ryou. Due to her height, she practices basketball everyday and comes home late, but still cooks for herself and Ryou and do all the housework… until all of the sudden another challenger has appeared.

[From [url=http://whatistomato.wordpress.com/2010/06/10/riaimo-mini-review/]Warum's review[/url]]

[spoiler]After her parents divorce her name changes to Nitta Shiori (新田 栞)[/spoiler]

- **Gender:** Female
- **Aliases:** 新田 栞, Nitta Shiori
- **Measurements:** Height: 148cm, Bust-Waist-Hips: 82-58-85cm
- **Birthday:** 6 June
- **Hair:** Brown, Twin Tails, Waist Length+, Straight, Spiky Bangs, Orange
- **Body:** Teen, Slim, Pale, Medium Breasts, Short
- **Clothes:** School Uniform, Pajamas, Thigh-high Stockings, Ribbon Tie, Ribbon Hair Tie, Sailor School Uniform
- **Personality:** Hard Worker, Modern Tsundere, Cold-hearted, Stubborn, Brother Complex, Watashi, Gloomy
- **Engages in:** Cooking, Cleaning, Basketball, Body Swap, Long Distance Relationship
- **Eyes:** Blue, Tsurime
- **Role:** Full Sister, Friend, Kouhai, Gamer, Transfer Student, Younger Sister, School Basketball Club Member, Temporary Protagonist, Secret Girlfriend, Tenth Grader
- **Subject of:** Injury, Netori (their SO is stolen), Guilt
- **Voiced by:** Toono Soyogi

### Senoo Miki (妹尾 美紀)
Akira’s sister, has a personality that on the ulterior seems shallow and judges men for their looks. However, cares for Shiori alot and considered to be close friends. Miki is bold and knows the otaku subculture well, doesn’t hesitate to use her “moe” to seduce Ryou.

[From [url=http://whatistomato.wordpress.com/2010/06/10/riaimo-mini-review/]Tomato Conspiracy[/url]]

- **Gender:** Female
- **Measurements:** Height: 162cm, Bust-Waist-Hips: 86-58-85cm
- **Birthday:** 25 October
- **Hair:** Blond, Long, Wavy, Parted in Middle, Sidehair
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Thigh-high Stockings, Ribbon Hair Accessory
- **Eyes:** Amber, Tsurime
- **Role:** Full Sister, Girlfriend, Friend, Schoolmate, Kouhai, High School Student, Younger Sister
- **Engages in:** Teasing, Flirting, Seduction
- **Personality:** Smart, Superficial
- **Subject of:** Netorare (they are the stolen SO)
- **Voiced by:** Hinata Ichigo

### Tsukiyoshi Mai (月吉 舞)
The real Mai who transformed into [url=/c459]Mai[/url] from the game world by a deity. She has an illness which makes her in the hospital and unable to leave without permission.

- **Gender:** Female
- **Hair:** Black, Waist Length+, Straight
- **Body:** Teen, Slim, Pale, Medium Breasts
- **Eyes:** Green
- **Clothes:** Dress, Sun Hat, Sleeveless Dress
- **Role:** Daughter, Pet Owner, Temporary Protagonist
- **Personality:** Altruistic, Kind, Naive, Brother Complex, Dog Person
- **Subject of:** Illness, Hospitalization, Weakness, Blessing
- **Engages in:** Self-sacrifice, Not Sexually Involved

### Koga Tsuyoshi (古賀 剛)
Basketball ace in the school that for some odd reason likes to pick fights with Ryou and Akira. Despises those that don’t take sports (life) seriously.

[From [url=http://whatistomato.wordpress.com/2010/06/10/riaimo-mini-review/]Tomato Conspiracy[/url]]

[spoiler]The real reason he is hostile toward Akira and Ryou is that he is actually a siscon and envious of Akira and Ryou to have a real imouto beside them. But he then falls in love with Ryou after he sees Ryou does a slamdunk.[/spoiler]

- **Gender:** Male
- **Hair:** Brown, Short
- **Body:** Teen, Pale
- **Clothes:** School Uniform, Necktie, T-shirt, Gym Shorts
- **Eyes:** Black
- **Personality:** Ore, Arrogant, Jock, Sister Complex, Envious
- **Role:** Rival, Senpai, High School Student, Homosexual, School Basketball Club Member
- **Engages in:** Unarmed Fighting, Basketball, Not Sexually Involved
- **Voiced by:** Sangen Chousuke

### Senoo Akira (妹尾 彰)
Protag’s best friend, which usually means perverted and not liked upon by the opposite sex. Exactly true here. He is another one of those onii-chan that seeks ideal imoutos in eroges…though in his case he’s just not being honest with himself. Although complains his sister’s tyranny to Ryou, he is the first to get angered when his sister is looked down upon. He also hates NTR too.

[Edited from [url=http://whatistomato.wordpress.com/2010/06/10/riaimo-mini-review/]Tomato Conspiracy[/url]]

- **Gender:** Male
- **Hair:** Black, Short
- **Clothes:** School Uniform, Jacket, Necktie, T-shirt, Jeans
- **Eyes:** Amber
- **Personality:** Otaku, Idiot, Pervert, Kind, Funny
- **Role:** Full Brother, Friend, Classmate, Senpai, High School Student, Gamer, Older Brother
- **Items:** Bag
- **Engages in:** Unarmed Fighting, Basketball, Not Sexually Involved
- **Subject of:** Netori (their SO is stolen)
- **Voiced by:** Onomura Shintarou

## Shops
- [Official Website](http://www.h-comb.biz/product/03/index.html)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ008889.html)

## Releases
### Japanese
- **2010-05-14**: Real Imouto ga Iru Ooizumi-kun no Baai - Trial Edition - [Official website](http://www.h-comb.biz/product/03/page_dl/dl_tr.html)
- **2010-05-28**: Real Imouto ga Iru Ooizumi-kun no Baai - [Official website](http://www.h-comb.biz/product/03/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=13641)
- **2011-01-28**: Real Imouto ga Iru Ooizumi-kun no Baai - Popular Edition - [Official website](http://www.h-comb.biz/product/03/index.html)
- **2013-11-15**: Real Imouto ga Iru Ooizumi-kun no Baai - Download Edition - [Official website](http://www.h-comb.biz/product/03/index.html), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ008889.html), [Gyutto](https://gyutto.com/i/item132954), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0106317/), [DL.Getchu](http://dl.getchu.com/i/item1004935), [DMM](https://dlsoft.dmm.co.jp/detail/views_0314/)
- **2014-08-29**: Alcot Honey Comb Bunko Set
- **2017-04-28**: Alcot Honey Comb Bunko Set - Download Edition - [DMM](https://dlsoft.dmm.co.jp/detail/views_0532pack/)

### Chinese (simplified)
- **2010-08-21**: Shimei Xiangban de Ooizumi-kun - [Official website](https://bbs.sumisora.net/read.php?tid=10971357)

### English
- **2011-08-13**: Real Imouto ga Iru Ooizumi-kun no Baai - [Official website](http://tlwiki.org/index.php?title=Real_Imouto_ga_Iru)
- **2023-11-29**: Real Imouto ga Iru Ooizumi-kun no Baai - [Official website](https://www.mediafire.com/file/v2s3u4pbkz7harm/Real_Imouto_Commom_Route_Patch.zip/file)

### Korean
- **2012-07-02**: Silje Yeodongsaengi Inneun Ooizumi-gunui Gyeongu

### Vietnamese
- **2013-04-22**: Real Imouto ga Iru Ooizumi-kun no Baai - [Official website](http://buztrans.blogspot.com/)

## Tags
ADV, High School, Blood-related Brother/Sister Incest, Non-blood-related Brother/Sister Incest, Brother/Sister Romance, Comedy, Kuudere Heroine, Imouto-type Heroine, Male Protagonist, Enforced Playing Order, Foolish Friend, One True End, Deredere Heroine, Otaku Protagonist, Family, Fictional Modern Day Japanese Town, Protagonist's Non-blood-related Sister as a Heroine, Low Sexual Content, Homosexual Support Character, Dying Heroine, Female Protagonist for a Short Time, Late Sexual Content, Protagonist with Glasses, Under the Same Roof, Slice of Life Drama, Unlockable Routes, Heroine with Zettai Ryouiki, Donkan Protagonist, School Sports Club Member Heroine, Breaking the Fourth Wall, Nakige, Tsundere Heroine, Other Perspectives, Flashback, Body Swapping, Friendship, Female Domination, Protagonist with a Face, Defloration, No Common Sense Heroine, Pretending Heroine, Memory Alteration, Brocon Heroine, Colored Texts, Colored Name-tags, Few Choices, Siscon Protagonist, Scenario Selection, Varied Title Screens, Charming Protagonist, High School Student Heroine, Sex with Protagonist Only, Heroine with Small Breasts (Non-Loli), Body Swapped Sex, Protagonist's Full Sister as a Heroine, Single Blowjob, Cowgirl, Protagonist's Younger Sister as a Heroine, Single Footjob, Vaginal Fingering, Doggy Style, Gamer Protagonist, Missionary Position, Perverted Protagonist, Single Boobjob, Twin Tail Heroine, White Haired Heroine, Heroine with Ahoge, Only Virgin Heroines

## More Games from ALcot Honey Comb
- [Shinigami no Kiss wa Wakare no Aji](https://pinovel.net/v1660)
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- [Real Imouto ga Iru Ooizumi-kun no Baai](https://pinovel.net/v3746)
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---
*View the full details at [pinovel.net/v3746](https://pinovel.net/v3746).*

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