---
title: "Defcon☆One"
description: "Hiroshi is a pervert. when he accidentally saw Tetsuko, he fell in love with her, and jumped to her chest. Of course, he got turned down. Angry, he kicked a tra"
image: "https://t.vndb.org/cv/96/137096.jpg"
---

# Defcon☆One

![Defcon☆One](https://t.vndb.org/cv/96/137096.jpg)

**Alternative Title:** でふこん☆わん

**Aliases:** Defcon One ~Colonel and the Pleasant Companion~

**Developer:** Undel

**Release date:** Nov 18, 2005

**Platform:** Windows, Android, DVD, Website

**Language:** Japanese

**Rating:** 6.3/10 (15 votes)

## Description
Hiroshi is a pervert. when he accidentally saw Tetsuko, he fell in love with her, and jumped to her chest. Of course, he got turned down. Angry, he kicked a trash bin, that flew right to head of passing near girl Sora. Luckily, that saved her from a falling down сonstruction beam. Sora is an army maniac from a wealthy family, and she decided to return favor of saving her life to Hiroshi, so she accepted the "mission" that he proposed to her: get him girlfriend, or "woman that let him touch her ass and breasts". After the first step - transporting Hiroshi's all-boys school classroom to the rich all-girls school by helicopters, their hilarious school life starts...

DEFCON = DEFence readiness CONdition, see [Wikipedia](http://en.wikipedia.org/wiki/DEFCON) for more info.

## Characters
### Katou Hiroshi (加藤 弘)
- **Gender:** Male
- **Hair:** Black, Short
- **Eyes:** Hidden
- **Personality:** Pervert

### Fuurinji Sora (風鈴寺 空)
- **Gender:** Female
- **Hair:** Blond, Odango, Twin Tails, Long
- **Body:** Slim, Pale, Kid, Small Breast Sizes
- **Clothes:** School Uniform, Necktie, Beret, Military Uniform, Hair Tie
- **Role:** Student
- **Eyes:** Blue, Tareme
- **Items:** Rifle
- **Personality:** Loyal
- **Voiced by:** Kaneda Mahiru

### Haganejima Tetsuko (鋼島 鉄子)
- **Gender:** Female
- **Hair:** Blue, Ponytail, Twin Tails, Long
- **Body:** Teen, Slim, Pale
- **Clothes:** School Uniform, Hair Tie
- **Role:** Student, Student Council President, Wealthy, Homosexual, Popular
- **Eyes:** Green, Tareme
- **Personality:** Arrogant
- **Voiced by:** Isshiki Hikaru

### Hinoue Kagari (火ノ上 かがり)
- **Gender:** Female
- **Hair:** Black, Long, Parted to Side
- **Eyes:** Red
- **Clothes:** Robe, Kemonomimi Headband, Miko's Dress, Ribbon Hair Tie
- **Role:** Miko
- **Voiced by:** Kusunoki Suzune

### Suiryuuji Nanami (水龍寺 七海)
- **Gender:** Female
- **Hair:** Pink, Twin Tails, Braid
- **Eyes:** Violet
- **Clothes:** Jacket, Military Uniform, Peaked Cap
- **Role:** Rival
- **Voiced by:** Chatani Yasura

### Tsuchiya Kei (土屋 圭)
- **Gender:** Female
- **Hair:** Short, Green, Expressive Ahoge
- **Body:** Pale
- **Engages in:** Fighting
- **Eyes:** Green
- **Clothes:** Glasses, Maid's Dress, Maid's Headdress
- **Items:** Knife
- **Role:** Maid, Teacher, Bodyguard
- **Personality:** Protective
- **Voiced by:** Itou Touko

## Shops
- [Official Website](https://web.archive.org/web/20051216021950fw_/http://www.undel.net:80/ud002/index.html)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ002831.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=236045)

## Releases
### Japanese
- **2005-11-18**: Defcon☆One - [Official website](https://web.archive.org/web/20051216021950fw_/http://www.undel.net:80/ud002/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=6468), [Getchu](http://www.getchu.com/soft.phtml?id=200041)
- **2006-04-20**: Defcon☆One - DVDPG Edition - [Getchu](http://www.getchu.com/soft.phtml?id=236045)
- **2008-06-20**: Defcon☆One - Download Edition - [Official website](https://web.archive.org/web/20051216021950fw_/http://www.undel.net:80/ud002/index.html), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ002831.html), [Gyutto](https://gyutto.com/i/item34591), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0041267/), [DL.Getchu](http://dl.getchu.com/i/item1002342), [DMM](https://dlsoft.dmm.co.jp/detail/views_0115/)
- **2011-07-28**: Defcon☆One - [Official website](http://www.m-trix.jp/market/detail.php?t=1&i=defcon1SD)
- **2021-08-14**: Defcon☆One - [Official website](https://web.archive.org/web/20220120000455/https://oo.parts/title/7YRoFFl4MyPm9jgvpP3r)

## Tags
Sexual Content, ADV, Military, High School, Maid Heroine, Miko Heroine, Male Protagonist, Multiple Endings, School Life Comedy, Ojousama Heroine, Otaku Heroine, Airhead Heroine, Modern Day Japan, Homosexual Support Character, Student Heroine, Lesbian Heroine, Foolish Protagonist, Perverted Protagonist, Student Council President Heroine, Former All-girls School, Heroine with Expressive Ahoge, Lip Sync, Sex with Protagonist Only

## More Games from Undel
- [Tashika ni Kimi wa Koko ni Ita -You Were Certainly Here-](https://pinovel.net/v5344)
- [Defcon☆One](https://pinovel.net/v2250)
- [Okaerinasaimase ☆ Goshujin-sama ♪](https://pinovel.net/v4233)
- [Moe Moe Ryoujoku ~Idol Ikusei Project~](https://pinovel.net/v1586)
- [Ane Hame!](https://pinovel.net/v1876)
- [Rururu to Sasara no Sensei☆Oshiete ~Boku wa Onna no Obocchama~](https://pinovel.net/v4437)
- [Komusume](https://pinovel.net/v767)

---
*View the full details at [pinovel.net/v2250](https://pinovel.net/v2250).*

```json
{"@context":"https://schema.org","@type":"VideoGame","@id":"https://pinovel.net/v2250#game","name":"Defcon☆One","description":"Hiroshi is a pervert. when he accidentally saw Tetsuko, he fell in love with her, and jumped to her chest. Of course, he got turned down. Angry, he kicked a tra","url":"https://pinovel.net/v2250","image":"https://t.vndb.org/cv/96/137096.jpg","author":{"@type":"Organization","name":"Undel"},"aggregateRating":{"@type":"AggregateRating","ratingValue":"6.3","bestRating":10,"worstRating":1,"ratingCount":15}}
```