---
title: "Oppai Baka -Oppai Igai wa Mitomenai!!-"
description: "Youta is a high school student, and moves back to his hometown. But, it looks like something has been changed. Their residential areas are divided by their brea"
image: "https://t.vndb.org/cv/58/129358.jpg"
---

# Oppai Baka -Oppai Igai wa Mitomenai!!-

![Oppai Baka -Oppai Igai wa Mitomenai!!-](https://t.vndb.org/cv/58/129358.jpg)

**Alternative Title:** おっぱいバカ -おっぱい以外は認めない!!-

**Aliases:** おっぱいバカーおっぱい以外は認めない！！, Boob Idiot, Breast Idiot

**Developer:** OLE

**Release date:** Jun 29, 2007

**Platform:** Windows, DVD

**Language:** English, Japanese

**Rating:** 7.2/10 (46 votes)

## Description
Youta is a high school student, and moves back to his hometown. But, it looks like something has been changed. Their residential areas are divided by their breasts cup sizes. Breasts are now the center of everything! Just enjoy Oppai (breasts) life!!!

[From ErogeShop]

## Characters
### Takasaki Youta (貴岬 陽太)
Living alone in an apartment. Moved here due to my father's job. This is where the protagonist spent his childhood, returning after several years.

The town looks strangely different now. Everything revolves around breasts, a town divided by breasts. He'll have countless breast experiences with the girls who live here...

[From [url=https://www.getchu.com/soft.phtml?id=827979&gc=gc]Getchu[/url]]

- **Gender:** Male
- **Hair:** Brown
- **Personality:** Pervert, Assertive, Blunt
- **Role:** Transfer Student, Living Alone
- **Engages in:** Moving

### Aizawa Nagisa (亜依澤 薙紗)
A waitress at the Forest Side cafe. She's extremely shy and struggles with interacting with people.

She's trying to improve her personality by working part-time at the cafe, but her clumsy side makes it difficult for her to succeed.

Though introverted, her actions are surprisingly bold—almost as if she's an outgoing girl. When the protagonist treats her kindly, she goes beyond the cafe's standard service...

[From [url=https://www.getchu.com/soft.phtml?id=827979&gc=gc]Getchu[/url]]

- **Gender:** Female
- **Measurements:** Height: 166cm, Bust-Waist-Hips: 87-55-85cm, D cup
- **Birthday:** 16 May
- **Hair:** Twin Tails, Waist Length+, Green, Sidehair
- **Eyes:** Violet, Tareme
- **Clothes:** Glasses, Maid's Dress, Corset, Maid's Headdress, Puffy Sleeves, Waitstaff Uniform, Ribbon Hair Wrap
- **Personality:** Deredere, Reserved, Shy, Clumsy, Assertive
- **Role:** Waitstaff
- **Engages in:** Lactation
- **Subject of:** Breast Expansion
- **Body:** Big Breasts
- **Voiced by:** Minami Chiharu

### Harukaze Yumari (遥風 結毬)
A childhood friend and classmate who grew up playing together through neighborhood connections. Pure-hearted, considerate, and completely genuine, she's beloved by everyone.

Member of the ‘(Boob) Volleyball Club’. Despite having upperclassmen in the club, she's already widely recognized as the next club president—a dependable person.

She's delighted to reunite with the protagonist and treats him just as they did back then. However, feelings begin to blossom between them, different from their childhood friendship...

She's actually quite the jealous type, but she always thinks of the other person's feelings and bravely endures it.

[From [url=https://www.getchu.com/soft.phtml?id=827979&gc=gc]Getchu[/url]]

- **Gender:** Female
- **Measurements:** Height: 162cm, Bust-Waist-Hips: 91-54-86cm, E cup
- **Birthday:** 30 October
- **Hair:** Red, Waist Length+, Sidehair
- **Clothes:** School Uniform, Necktie, Miniskirt, Sport Bloomers, Belt, Detached Sleeves, Naked Apron, Ribbon Hair Accessory, Puffy Sleeves, Formal Shirt
- **Eyes:** Green, Tareme
- **Personality:** Deredere, Kind, Naive, Honest, Jealous, Closet Pervert
- **Role:** Girlfriend, Childhood Friend, Popular, School Volleyball Club Member
- **Engages in:** Lactation
- **Subject of:** Breast Expansion
- **Body:** Big Breasts
- **Voiced by:** Umezato Mio

### Hiiragi Yukina (柊 雪茄)
A widow living in a house near the apartment where the protagonist moved. She earns her living working as an instructor at the tea ceremony school in the target's house.

Though she acts cheerful and energetic, her expression still carries a hint of lingering loneliness.

Her indescribable charm—a blend of gentle, motherly warmth, mature femininity, and a touch of solitude—is irresistible to anyone who encounters her.

[From [url=https://www.getchu.com/soft.phtml?id=827979&gc=gc]Getchu[/url]]

- **Gender:** Female
- **Measurements:** Height: 167cm, Bust-Waist-Hips: 100-59-90cm, H cup
- **Birthday:** 2 September
- **Hair:** Black, Ponytail, Waist Length+, Sidehair
- **Eyes:** Red, Tareme, Hosome
- **Body:** Young-adult, Big Breasts
- **Role:** Widow, Teacher, Neighbor, Yamato Nadeshiko, Not a Virgin, Bisexual, Lonely
- **Personality:** Refined, Kind, Energetic, Mature, Cheerful
- **Clothes:** Ceremonial Japanese Clothing, Hair Tie, Unusual Hair Ornaments, Tomesode
- **Engages in:** Lactation
- **Subject of:** Breast Expansion
- **Voiced by:** Andou Ryuu

### Kinomoto Asuka (樹本 明日加)
Classmate. Belongs to the (Boob) Track and Field Club. The club's ace. An all-around athlete, she's in high demand as a substitute for other clubs.

She's an energetic girl who gets along well with others (especially close with Yumari) and shows her girly side to those around her.

For some reason, she rebels against the protagonist, always taking an aggressive stance, but as they spend time together, a change begins to show...?

[From [url=https://www.getchu.com/soft.phtml?id=827979&gc=gc]Getchu[/url]]

- **Gender:** Female
- **Measurements:** Height: 163cm, Bust-Waist-Hips: 84-54-83cm, C cup
- **Birthday:** 7 July
- **Hair:** Blue, Ponytail, Waist Length+, Sidehair
- **Clothes:** School Uniform, T-shirt, Ribbon Hair Tie, Spats, Puffy Sleeves
- **Eyes:** Amber
- **Personality:** Tsundere, Outgoing, Friendly, Rebellious
- **Engages in:** Lactation
- **Subject of:** Breast Expansion
- **Role:** School Athletic Club Member
- **Body:** Big Breasts
- **Voiced by:** Andou Ryuu

### Lulu (ルル)
A mysterious, peculiar girl who for some reason has taken up residence in the town's meeting hall.

Her actions and words are naturally naive, and her personality is elusive. While not outright mean-spirited, she often makes suggestive remarks that seem to imply something, and engages in enigmatic behavior.

She regularly gathers the town's girls for suspicious gatherings, but what is her true nature...?

[From [url=https://www.getchu.com/soft.phtml?id=827979&gc=gc]Getchu[/url]]

- **Gender:** Female
- **Measurements:** Height: 155cm, Bust-Waist-Hips: 80-50-80cm, B cup
- **Birthday:** 11 November
- **Hair:** Long, Cyan
- **Body:** Teen, Medium Breasts
- **Eyes:** Red
- **Clothes:** Ushanka, Skirt, Thigh-high Stockings, Turtleneck Sweater
- **Personality:** Pervert, Naive, Strange, Mysterious
- **Role:** Bisexual
- **Engages in:** Lactation
- **Voiced by:** Kanematsu Yuka

### Nagakura Mato (流倉 的)
Upperclassman. Member of the (boob) Archery Club. The only daughter of a prestigious tea ceremony family, the Nagakura School, she's an old-fashioned young lady.

Raised in a sheltered environment, she has a serious and gentle personality. She's demure. However, perhaps due to her somewhat airheaded nature, she can be a bit too laid-back?

She's not exactly shy around people, but she lacks immunity to men. For the protagonist, he seems to be the only guy her age she can talk to easily.

[From [url=https://www.getchu.com/soft.phtml?id=827979&gc=gc]Getchu[/url]]

- **Gender:** Female
- **Measurements:** Height: 164cm, Bust-Waist-Hips: 97-58-87cm, G cup
- **Birthday:** 10 August
- **Hair:** Violet, Ponytail, Waist Length+, Sidehair
- **Body:** Teen, Huge Breasts
- **Clothes:** School Uniform, Hakama
- **Eyes:** Green, Tareme
- **Personality:** Friendly, Relaxed, Refined, Kind, Serious, Old-fashioned, Humble
- **Role:** Girlfriend, School Archery Club Member, Senpai, Yamato Nadeshiko, Ojousama
- **Engages in:** Lactation
- **Subject of:** Androphobia, Breast Expansion
- **Voiced by:** Minami Chiharu

### Nanami Hinata (奈波 ひなた)
The daughter of Naba Sake Brewery, a long-established shop in town. She's the beloved poster girl of the shopping district, known for her adorable efforts working at the storefront.

While she has a bright and cheerful personality, she's also quite shy. She's a genuinely sweet girl who blushes bright red and beams with happiness when praised by others, including the protagonist.

She hits it off with the protagonist, who has just moved in, and they begin interacting. Each time they meet, she blushes and fidgets nervously, her earnestness making her utterly endearing.

[From [url=https://www.getchu.com/soft.phtml?id=827979&gc=gc]Getchu[/url]]

- **Gender:** Female
- **Measurements:** Height: 162cm, Bust-Waist-Hips: 93-57-88cm, F cup
- **Birthday:** 20 December
- **Hair:** Blond, Twin Tails, Long
- **Eyes:** Blue
- **Clothes:** Miniskirt, Thigh-high Stockings, Tank Top, Bell (accessory), Hair Tie, Off-The-Shoulder Sweater
- **Personality:** Deredere, Shy, Friendly, Energetic, Obedient, Cheerful
- **Role:** Kanban Musume, Popular
- **Engages in:** Lactation
- **Subject of:** Breast Expansion
- **Body:** Body Painting, Huge Breasts
- **Voiced by:** Oukawa Mio

### Shinoo Sakura (篠音 咲桜)
A teacher who arrived as a trainee about a week before the protagonist transferred. She became the homeroom teacher for the protagonist's class.

She has a strong, dependable personality and is very caring. Even though she's still in training, she's highly regarded by the students. She's admired by both boys and girls, seen as an aspirational, kind older sister figure.

She shows particular kindness and concern for the newly transferred protagonist, worrying about everything and offering advice whenever needed.

[From [url=https://www.getchu.com/soft.phtml?id=827979&gc=gc]Getchu[/url]]

- **Gender:** Female
- **Measurements:** Height: 169cm, Bust-Waist-Hips: 104-60-94cm, I cup
- **Birthday:** 23 April
- **Hair:** Brown, Long
- **Eyes:** Blue
- **Clothes:** Miniskirt, Cravat, Skirt Suit, Formal Shirt
- **Personality:** Friendly, Kind, Mature, Flustered, Insightful
- **Role:** University Student, Popular, Homeroom Teacher, Ane Act, Student Teacher
- **Engages in:** Lactation
- **Subject of:** Breast Expansion
- **Body:** Huge Breasts
- **Voiced by:** Oukawa Mio

### Tomose Nonomi (友瀬 乃々実)
A younger female classmate who looks up to the protagonist as a “senpai.” She belongs to both the (Boob) Wind Ensemble Club and the (Boob) Broadcasting Club.

She stammers and gets flustered easily. Though she struggles to express herself well, hints of her feelings for the protagonist peek through?

She has a slightly timid side, but at heart she's dependable and serious. She has a complex about her small chest and confides in the protagonist about it, but...

[From [url=https://www.getchu.com/soft.phtml?id=827979&gc=gc]Getchu[/url]]

- **Gender:** Female
- **Measurements:** Height: 155cm, Bust-Waist-Hips: 78-49-78cm, A cup
- **Birthday:** 5 February
- **Hair:** Brown, Shoulder-length, Sidehair
- **Body:** Teen, Small Breasts
- **Clothes:** School Uniform, Miniskirt, Thigh-high Stockings, Tank Top, Crop Top, Choker, Ribbon Headband
- **Personality:** Deredere, Low Self-esteem, Timid, Kind, Serious, Dandere
- **Role:** Girlfriend, Kouhai, Bisexual, School Band Member, Broadcasting Committee Member
- **Subject of:** Inferiority Complex
- **Eyes:** Garnet
- **Voiced by:** Kanematsu Yuka

### Hoshifuji Kesuke (星藤 ケースケ)
Classmate. A “good guy” who kindly offers advice on various things after the protagonist transfers schools.

Quite laid-back. He guides the protagonist on how to navigate life in this town and school, incorporating a male perspective (?).

Eventually becomes the protagonist's best friend. Has narrow eyes.

[From [url=https://www.getchu.com/soft.phtml?id=827979&gc=gc]Getchu[/url]]

- **Gender:** Male
- **Hair:** Brown, Ponytail
- **Role:** Classmate
- **Eyes:** Itome

### Marukubo Hidenoshin (丸窪 秀ノ信)
Founder of Kanade Sakura Academy and serves as its principal.

With a cheerful personality, he maintains (superficially) good relationships with students regardless of gender. 

However, unsavory rumors circulate among some female students... A lecherous old man who loves breasts.

[From [url=https://www.getchu.com/soft.phtml?id=827979&gc=gc]Getchu[/url]]

- **Gender:** Male
- **Hair:** Moustache
- **Clothes:** Suit, Necktie
- **Role:** Principal

## Shops
- [Official Website](http://www.teck.co.jp/ole/products/oppai/index.html)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ004703.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=827979)

## Releases
### Japanese
- **2007-06-29**: Oppai Baka -Oppai Igai wa Mitomenai!!- - [Official website](http://www.teck.co.jp/ole/products/oppai/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=9068), [Getchu](http://www.getchu.com/soft.phtml?id=397405)
- **2009-05-29**: Oppai Baka -Oppai Igai wa Mitomenai!!- DVDPG - [Official website](https://web.archive.org/web/20160813080948/http://www.aicherry.com/aicherryhp/contents/aicherry/jacket/aicdv0193/aicdv0193.html), [Getchu](http://www.getchu.com/soft.phtml?id=639545)
- **2010-06-11**: Oppai Baka -Oppai Igai wa Mitomenai!!- Download Edition - [Official website](http://www.teck.co.jp/ole/products/oppai/index.html), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ004703.html), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0041625/), [DMM](https://dlsoft.dmm.co.jp/detail/hobc_0216/)
- **2014-11-12**: Oppai Baka - Renewal Package Edition - DVDPG - [Official website](https://web.archive.org/web/20150509184043/http://www.aicherry.com/aicherryhp/contents/petitcherry/jacket/aicdv0446/aicdv0446.html), [Getchu](http://www.getchu.com/soft.phtml?id=827979), [DMM](https://www.dmm.co.jp/mono/anime/-/detail/=/cid=1481aicdv0446/)

### English
- **2025-04-06**: Oppai Baka ~An Idiot for TITS, In a World Full of TITS!!~ - [Official website](https://tamagolemon.blogspot.com/2025/04/oppai-baka-english-translation-port.html)

## Tags
Sexual Content, ADV, High School, Male Protagonist, Teacher Heroine, Protagonist's Childhood Friend as a Heroine, Nameable Protagonist, Nukige, High Sexual Content, Student Heroine, Cafe, Big Breast Sizes Heroine, Lactation During Sex, Breast Expansion, Outdoor Sex, Heroine with Gigantic Breasts, Breast Torture, Ejaculation Choice, Single Boobjob, Body Writing, Breast Smothering, Panic Button, Heroine with Huge Breasts, Heroine with Big Breasts, Ejaculation Forewarner, Suction on Nipples, Adult Breast Sucking, Early Sexual Content, Heroine with Small Breasts (Non-Loli), Anal Sex, Comedy, Linear Plot, Voyeurism, Harem Ending, Unlockable Bonus Content

## More Games from OLE
- [Tenmusu!? ~Tonikaku Yoku Korobu Dojikko-tachi~](https://pinovel.net/v2878)
- [Iron Maiden -Hagane no Otome-](https://pinovel.net/v497)
- [Oppai Baka -Oppai Igai wa Mitomenai!!-](https://pinovel.net/v1802)
- [Tsuribaka ~Gakuen Taikou! Joshikousei Tsuriage Adventure~](https://pinovel.net/v3365)

---
*View the full details at [pinovel.net/v1802](https://pinovel.net/v1802).*

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```