---
title: "Dekachin Kozou"
description: "There are 3 older heroines for the protagonist to conquer! Friend's kind mother Eri, nagging neighbor and housewife Ayumi, and the cool teacher Yuuka.  The boy "
image: "https://t.vndb.org/cv/59/27359.jpg"
---

# Dekachin Kozou

![Dekachin Kozou](https://t.vndb.org/cv/59/27359.jpg)

**Alternative Title:** デカチンコゾー

**Aliases:** デカチ○コゾー, Dekachi○Kozou, Dekachi-Kozou

**Developer:** Doujin3aries

**Release date:** Oct 26, 2015

**Platform:** Windows

**Language:** English, Indonesian, Japanese, Russian

**Rating:** 7.0/10 (214 votes)

## Description
There are 3 older heroines for the protagonist to conquer! Friend's kind mother Eri, nagging neighbor and housewife Ayumi, and the cool teacher Yuuka.

The boy who can make those three women cum again and again is Yamato, the resident mischievous but unhateable kid with a massive dick!

[Edited from [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ164389.html)]

## Characters
### Tsuji Yamato (辻 ヤマト)
A mischievous, yet kind at heart boy who lives with his uncaring, sometimes abusive, father. His mother left him to his father for as long as Yamato can remember, and thus he doesn't know nor remember anything about his mother.

- **Gender:** Male
- **Hair:** Blond, Short
- **Body:** Slim, Kid, Olive, Freckles, Large Penis
- **Eyes:** Hazel
- **Clothes:** T-shirt, Shorts
- **Personality:** Ore, Pervert, Rude, Mischievous, Blunt, Opposite Gender Voiced
- **Engages in:** Smoking, Teasing, Blackmail, Moving
- **Subject of:** Child Abuse, Child Abandonment
- **Role:** Friend, Classmate, Poor, Elementary School Student, Sex Friend, Secret Boyfriend
- **Voiced by:** Yura

### Isoyama Yuuka (磯山 ゆうか)
The cool-headed homeroom teacher of Yamato.

- **Gender:** Female
- **Hair:** Brown, Curtained, Shoulder-length, Straight, Parted to Side, Pubic Hair
- **Body:** Young-adult, Olive, Big Breasts
- **Clothes:** Glasses, Skirt Suit, Naked in Front of an Audience
- **Personality:** Secretive, Kuudere, Stoic, Reserved, Serious, Watashi, Closet Pervert
- **Role:** Girlfriend, Coworker, Not a Virgin, Homeroom Teacher, Secret Girlfriend
- **Eyes:** Cyan
- **Engages in:** Moving
- **Voiced by:** Igashima Ako

### Makita Eri (牧田 エリ)
The gentle mother of Yamato's friend.

- **Gender:** Female
- **Hair:** Black, Short, Pubic Hair
- **Engages in:** Cooking, Driving, Drinking, Childbirth, Avoidable Infidelity
- **Eyes:** Violet
- **Body:** Young-adult, Olive, Mole, Huge Breasts
- **Clothes:** Earrings, Necklace, Skirt, Belt, Blouse, Bracelet
- **Role:** Wife, Mother, Not a Virgin, Part-time Worker, Sex Friend
- **Subject of:** Pregnancy
- **Personality:** Kind, Watashi
- **Voiced by:** Natsuki Kaname

### Mizoguchi Ayumi (溝口 亜弓)
A nagging wife in the same district as Yamato.

- **Gender:** Female
- **Hair:** Blond, Wavy, Shoulder-length, No Bangs, Pubic Hair
- **Body:** Pale, Young-adult, Mole, Big Breasts
- **Engages in:** Cooking, Avoidable Infidelity, Child Abandonment
- **Eyes:** Amber
- **Clothes:** Earrings, Naked in Front of an Audience
- **Personality:** Pretending, Arrogant, Atashi, Jealous, Gossipy
- **Subject of:** Blackmail
- **Role:** Divorcee, Mother, Girlfriend, Not a Virgin, Housewife, Secret Girlfriend
- **Voiced by:** Saijou Madoka

### Hiranaka (平中)
A teacher at Yamato's school who has a crush on his coworker [url=https://vndb.org/c39247]Yuuka[/url]. Hates Yamato.

- **Gender:** Male
- **Hair:** Black, Bowl Cut
- **Body:** Slim, Young-adult, Olive
- **Eyes:** Black
- **Clothes:** Suit
- **Personality:** Deredere, Boku, Ore, Jealous, Watashi
- **Role:** Boyfriend, Teacher, Coworker
- **Engages in:** Not Sexually Involved
- **Voiced by:** Minazuki Hisui

### Kazu (カズ)
The son of [url=https://vndb.org/c39254]Eri[/url] and one of Yamato's friends. He likes getting spoiled by his mother.

- **Gender:** Male
- **Hair:** Brown, Short, Parted to Side
- **Eyes:** Brown
- **Body:** Slim, Kid, Olive
- **Clothes:** Shirt, T-shirt, Shorts
- **Personality:** Spoiled, Opposite Gender Voiced
- **Role:** Son, Friend, Classmate, Transfer Student, Elementary School Student, Older Brother, Half-brother
- **Engages in:** Fishing, Not Sexually Involved
- **Voiced by:** Hiiragi Haruka

### Konta (コンタ)
One of Yamato's friends. He likes hanging out with Yamato despite their difference in personality.

- **Gender:** Male
- **Hair:** Black, Bowl Cut
- **Body:** Slim, Pale, Kid
- **Role:** Student, Friend, Classmate, Elementary School Student
- **Eyes:** Grey
- **Clothes:** Shirt, Shorts
- **Personality:** Timid, Opposite Gender Voiced
- **Voiced by:** Hasumi Noeru

## Shops
- [Official Website](http://www.doujin-3aries.sakura.ne.jp/s/014-deka/index.html)
- [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ164389.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=878826)

## Releases
### Japanese
- **2015-10-26**: Dekachin Kozou - Download Edition - [Official website](http://www.doujin-3aries.sakura.ne.jp/s/014-deka/index.html), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=22678), [DLsite](https://www.dlsite.com/maniax/work/=/product_id/RJ164389.html), [Gyutto](https://gyutto.com/i/item158509), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0124178/), [Melonbooks.co.jp](https://www.melonbooks.co.jp/detail/detail.php?product_id=932896), [DMM](https://dlsoft.dmm.co.jp/detail/dou3a_0016/)
- **2015-12-11**: Dekachin Kozou - Package Edition - [Official website](http://www.doujin-3aries.sakura.ne.jp/s/014-deka/index.html), [Melonbooks.co.jp](https://www.melonbooks.co.jp/detail/detail.php?product_id=143583), [Getchu](http://www.getchu.com/soft.phtml?id=878826), [Toranoana](https://ec.toranoana.shop/tora/ec/item/040030361605/)

### English
- **2023-05-26**: Big Dick Brat - [Patreon post](https://www.patreon.com/posts/88665844)

### Russian
- **2024-03-26**: Big Dick Brat - [Official website](https://pornolab.net/forum/viewtopic.php?t=3071622)

### Indonesian
- **2025-04-04**: Si Bocah Punya Penis Besar~

## Tags
ADV, School, Kuudere Heroine, Protagonist with Voice Acting, Multiple Endings, Teacher Heroine, Heroine with Glasses, Nukige, Modern Day Japan, Netori, Married Heroine, Narrating Others' Thoughts, Foolish Protagonist, Perverted Protagonist, Blackmail, Shota Protagonist, Bad Ending(s), Emotionless Heroine, Protagonist with a Face, Sex in Public Places, Wake-up Sex, Chubby Heroine, Missionary Position, Sounds of Copulation, Impregnation, Lots of Choices, Consensual Group Sex of One Female and Several Males, Doggy Style, Panchira, Heroine with Beauty Mark, Comedic Sex Scenes, Naked Sprites, Student-Teacher Romance, Sex with Sleepers, Anal Toys, Excessive Semen, Only One Good Ending, Ahegao, Consumption of Pornography, Drunk Sex, Protagonist with a Sprite, Obacon, Heroine with Children, Highly Animated Sprites, Straight Shotacon, Background Moans, Voiced Thoughts, Quickie Fix Position, Shota Support Character, Only Adult Heroines, Perverted Heroine, Only Older Heroines, Mischievous Protagonist, Threesome, Only Non-Virgin Heroines, Rape by Shota, Single Blowjob, Heroine with Huge Breasts, Heroine with Big Breasts, Infidelity, Outdoor Sex, Discreet Sex

## More Games from Doujin3aries
- [Oneshota DX](https://pinovel.net/v18558)
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- [Oneshota DX3 ~Otoko no Ko x Toshiue no Kyonyuu Oneesan~](https://pinovel.net/v18560)
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- [Hitozuma to](https://pinovel.net/v18553)
- [One Police](https://pinovel.net/v18554)
- [Oneshota DX4](https://pinovel.net/v18561)
- [Kawakaburi no Cherry](https://pinovel.net/v10119)
- [Tokyo Shota Street](https://pinovel.net/v7400)
- [Yarisugi Kozoo](https://pinovel.net/v13445)
- [Inma Rairin ~Shota o Fudeoroshi~](https://pinovel.net/v18555)
- [Anata Gomennasai, Watashi Mou...](https://pinovel.net/v15456)
- [J○ Kuro Gyaru x Shota ~Sakki Miteta yo ne?~](https://pinovel.net/v18557)
- [Dekachin Kozou](https://pinovel.net/v18540)

---
*View the full details at [pinovel.net/v18540](https://pinovel.net/v18540).*

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