---
title: "Owaru Sekai to Birthday"
description: "On September 29, 2012, the world will end. The majority of people did not believe in this internet rumour, but many were still apprehensive as the date approach"
image: "https://t.vndb.org/cv/92/96092.jpg"
---

# Owaru Sekai to Birthday

![Owaru Sekai to Birthday](https://t.vndb.org/cv/92/96092.jpg)

**Alternative Title:** 終わる世界とバースデイ

**Aliases:** The end of the world and happy birthday, Shuuba(終バ)

**Developer:** Cotton Soft

**Release date:** Jul 27, 2012

**Platform:** Windows, iOS, Android, PS Vita

**Language:** Japanese, Chinese (simplified)

**Rating:** 7.6/10 (192 votes)

## Description
On September 29, 2012, the world will end. The majority of people did not believe in this internet rumour, but many were still apprehensive as the date approached. Kazuomi was not one of these people. To him, the most important thing is to protect his late best friend Touya’s younger sister Iri whose eyesight is close to blindness. She had mistaken him for her own brother since Touya’s death in a motorcycle accident two years ago. Later, his classmate Mikaeru enlisted him into her unofficial circle, the ’9.29 countermeasures group’, which investigates whether or not the rumours are true and plans ways to prevent the end of the world. September 29 is fast approaching. It is the date when Touya died, and also Iri’s birthday.

[Edited from [Hau~ Omochikaeri!](http://omochikaeri.wordpress.com/2012/07/01/july-2012-eroge-releases/)]

## Characters
### Touya Kazuomi (冬谷 和臣)
- **Gender:** Male
- **Alias:** Kazu
- **Hair:** Brown, Short, Spiky Bangs
- **Body:** Teen, Adult
- **Clothes:** School Uniform
- **Personality:** Proactive, Donkan, Protective
- **Eyes:** Blue, Tsurime
- **Subject of:** Wounding
- **Role:** High School Student, Coder, Ani Act

### Chigasaki Iri (千ヶ崎 入莉)
Ili is younger sister of Kazuomi's deceased best friend, Touya. Her eye sight is close to blindness, and she mistakes Kazuomi for her dead older brother.

- **Gender:** Female
- **Hair:** White, Waist Length+, Wavy, Spiky Bangs, Sidehair
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Mini-dress, Vest, Miniskirt, Knee-high Socks, Maid's Dress, Naked Apron, Ribbon Tie, Torn Clothing
- **Engages in:** Cooking, Sleepwalking, Self-harm
- **Subject of:** Assault, Torture, Blindness, Mental Affliction, Avoidable Death (obsolete), Psychological Trauma, Mental Breakdown, Color Blindness
- **Personality:** Reserved, Kind, Naive
- **Role:** Full Sister, Childhood Friend, High School Student, Younger Sister, Imouto Act
- **Eyes:** Garnet, Tareme
- **Voiced by:** Miru

### Fujishiro Hiragi (藤白 柊)
Kazuomi's classmate who is actually one year older than him, but was held back a year. She is known for her cold gaze which can freeze almost anybody on the spot.

- **Gender:** Female
- **Aliases:** Friezza, Friezza-sama, フリーザ様
- **Hair:** Violet, Ponytail, Straight, Spiky Bangs, Parted to Side, Ankle Length, Sidehair
- **Body:** Teen, Slim, Pale, Adult
- **Clothes:** School Uniform, Trousers, Pantyhose, Belt, Hairpin, Blouse, Hair Tie, Skirt Suit
- **Engages in:** Cooking, Reading
- **Eyes:** Blue, Tsurime
- **Role:** Employer, Classmate, High School Student, Executive, Library Committee Member, Repeater
- **Personality:** Relaxed, Pragmatic, Bookworm, Sharp-tongued
- **Items:** Book
- **Voiced by:** Kiritani Hana

### Nagoshi Mikaeru (夏越 大天使)
Kazuomi's classmate who completely believes the rumors about the world ending.

- **Gender:** Female
- **Alias:** Mika
- **Hair:** Blond, Twin Tails, Waist Length+, Straight, Blunt Bangs
- **Body:** Teen, Slim, Pale, Flat Chest
- **Eyes:** Blue
- **Clothes:** Miniskirt, Bow Tie, Blouse, Ribbon Hair Accessory, Sailor School Uniform, Patterned Thigh-high Stockings
- **Personality:** Tsundere, Timid
- **Role:** High School Student
- **Voiced by:** Moriya Misono

### Orizuka Misaki (織塚 美咲)
- **Gender:** Female
- **Hair:** Pink, Ahoge, Shoulder-length, Twin Braids, Tiny Braid
- **Body:** Teen, Slim, Pale, Small Breasts
- **Clothes:** Mini-dress, Thigh-high Stockings, Ribbon Hair Tie, Sailor School Uniform
- **Role:** Step Sister, Artificial Intelligence, High School Student, Younger Sister
- **Eyes:** Tareme, Cyan
- **Voiced by:** Natsuno Koori

### Suwa Naruko (諏訪 成子)
One of the few friends Kazuomi has, a NEET living upstairs from his apartment. The only time she interacts with Kazuomi is due to the "’9.29 countermeasures group" because it's organized in her room.

- **Gender:** Female
- **Alias:** Naru
- **Hair:** Brown, Ahoge, Long, Wavy, Spiky Bangs, Parted to Side, Sidehair
- **Body:** Slim, Pale, Young-adult, Big Breasts
- **Eyes:** Blue, Tareme
- **Clothes:** Suit, Glasses, T-shirt, Shorts, Pantyhose, Maid's Dress, Bikini, Hairpin, Skirt Suit, Tracksuit, Formal Shirt
- **Items:** Handgun
- **Personality:** Lazy, Mischievous
- **Engages in:** Drinking, Investigation
- **Role:** NEET, Neighbor, Detective, Hikikomori, Older Sister
- **Voiced by:** Aoyama Yukari

### Touya Iri (冬谷 イリ)
The AI simulating with Ili's data and spent time in the Simulated world with Kazuomi

- **Gender:** Female
- **Alias:** Test number 49
- **Birthday:** 29 September
- **Hair:** Wavy, Spiky Bangs, Sidehair
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Mini-dress, Vest, Miniskirt, Knee-high Socks, Maid's Dress, Naked Apron, Ribbon Tie
- **Eyes:** Blue, Tareme
- **Personality:** Reserved, Kind, Naive
- **Subject of:** Blindness, Avoidable Death (obsolete)
- **Role:** Artificial Intelligence, High School Student

### Chigasaki Touya (千ヶ崎 陶也)
- **Gender:** Male
- **Hair:** White
- **Eyes:** Red, Hosome
- **Clothes:** Jacket
- **Role:** Full Brother, Older Brother
- **Subject of:** Pre-Story Death
- **Voiced by:** Hatoman Gunsou

### Gotou (後藤)
- **Gender:** Male
- **Hair:** Brown, Curtained, Short, Parted in Middle
- **Body:** Teen
- **Clothes:** School Uniform
- **Eyes:** Green, Hosome
- **Items:** Knife
- **Engages in:** Suicide, Torture, Assault, Avoidable Murder
- **Subject of:** Bullying, Insanity, Clinical Depression
- **Personality:** Cold-hearted, Cruel, Obsessive, Gloomy
- **Role:** High School Student

### Suwa Ikuo (諏訪 郁生)
- **Gender:** Male
- **Hair:** Brown, Bob Cut, Shoulder-length, Side Tail, Spiky Bangs
- **Engages in:** Cross-dressing
- **Body:** Trap, Slim, Pale, Kid
- **Eyes:** Violet, Tareme
- **Clothes:** Mini-dress, Thigh-high Stockings, Maid's Dress, Hairpin, Ribbon Tie, Maid's Headdress
- **Role:** Younger Brother
- **Personality:** Opposite Gender Voiced
- **Voiced by:** Yukito Saori

## Shops
- [Official Website](http://www.entergram.co.jp/owarusekai/)
- [Getchu](http://www.getchu.com/soft.phtml?id=759723)

## Releases
### Japanese
- **2012-06-06**: Owaru Sekai to Birthday - Trial Edition - [Official website](http://cotton-soft.com/gameproducts/06_OwarusekaiToBirthday/index.html)
- **2012-07-27**: Owaru Sekai to Birthday - First Press Edition - [Official website](https://web.archive.org/web/20160314222809/http://cotton-soft.com/gameproducts/06_OwarusekaiToBirthday/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=16752), [Getchu](http://www.getchu.com/soft.phtml?id=737398)
- **2012-12-21**: Owaru Sekai to Birthday - Regular Edition - [Official website](https://web.archive.org/web/20160314222809/http://cotton-soft.com/gameproducts/06_OwarusekaiToBirthday/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=16752), [Getchu](http://www.getchu.com/soft.phtml?id=759723)
- **2014-07-18**: Owaru Sekai to Birthday - Download Edition - [Official website](http://cotton-soft.com/gameproducts/OwarusekaiToBirthday.html), [Gyutto](https://gyutto.com/i/item127605)
- **2015-12-29**: Owaru Sekai to Birthday - DX Pack - [Official website](http://cotton-soft.com/order89/order_info_c89.html)
- **2016-03-11**: Owaru Sekai to Birthday - [Official website](http://moeapp.net/special/owarusekai.html)
- **2016-05-10**: Owaru Sekai to Birthday - [Official website](http://moeapp.net/special/owarusekai.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=39790)
- **2017-05-11**: Owaru Sekai to Birthday - Download Edition - [Official website](http://www.entergram.co.jp/owarusekai/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=24017)
- **2017-05-11**: Owaru Sekai to Birthday - Regular Edition - [Official website](http://www.entergram.co.jp/owarusekai/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=24017), [PlayAsia](https://www.play-asia.com/13/70axdd)
- **2017-05-11**: Owaru Sekai to Birthday - First Press Limited Edition - [Official website](http://www.entergram.co.jp/owarusekai/), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=24017), [PlayAsia](https://www.play-asia.com/13/70axdf)
- **2022-01-28**: NekoNeko 20th anniversary box - [Official website](https://nekoneko-soft.info/webshopinfo/#C99info), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=32490)

### Chinese (simplified)
- **TBA**: Shijie Zhongjie Yu Shengrikuaile

## Tags
Fear of Death, Mystery, Sexual Content, ADV, High School, Science Fiction, Imouto-type Heroine, AI Heroine, Male Protagonist, Drama, Gore, Life and Death Drama, Suicide, Protagonist's Brother as a Support Character, One True End, Otaku Heroine, Protagonist's Childhood Friend as a Heroine, Blind Heroine, Madness, Virtual Reality, Apocalypse, Heroine with Psychological Problems, Psychological Trauma, Donkan Protagonist, Breaking the Fourth Wall, Tsundere Heroine, Bad Ending(s), Flashback, Ponytail Heroine, Proactive Protagonist, Friendship, Protagonist with a Face, Side Portraits, Death of Heroine, Twin Tail Heroine, High School Student Protagonist, White Haired Heroine, Central Heroine, Internet, Social Networking Service, Pragmatic Heroine, High School Student Heroine, Heroine with Big Breasts

## More Games from Cotton Soft
- [Natsumegu](https://pinovel.net/v897)
- [Reconquista](https://pinovel.net/v471)
- [Nagisa no](https://pinovel.net/v401)
- [Chokotto! Fandisc](https://pinovel.net/v2162)
- [Amber Quartz](https://pinovel.net/v1198)
- [Gratin](https://pinovel.net/v3823)
- [NekoNeko Soft Okaeshi CD 7](https://pinovel.net/v11131)
- [Chokotto! Fandisc 2](https://pinovel.net/v5085)
- [Owaru Sekai to Birthday](https://pinovel.net/v9196)
- [Futagoza no Paradox](https://pinovel.net/v11865)
- [Owaru Sekai to Futagoza no Paradise](https://pinovel.net/v13895)
- [Katakoi Visionary](https://pinovel.net/v15631)
- [Dabuimo Visionary](https://pinovel.net/v16440)

---
*View the full details at [pinovel.net/v9196](https://pinovel.net/v9196).*

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```