---
title: "Cosutte Alien -Yuuwaku no Cosplay H-"
description: "The main character and his friends are attending their class in a quiet academy like normal students when a UFO suddenly passes overhead. The whole academy begi"
image: "https://t.vndb.org/cv/51/3951.jpg"
---

# Cosutte Alien -Yuuwaku no Cosplay H-

![Cosutte Alien -Yuuwaku no Cosplay H-](https://t.vndb.org/cv/51/3951.jpg)

**Alternative Title:** コスってエイリアン -誘惑のコスプレH-

**Developer:** Score

**Release date:** Jan 28, 2005

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

**Language:** English, Japanese

**Rating:** 5.4/10 (323 votes)

## Description
The main character and his friends are attending their class in a quiet academy like normal students when a UFO suddenly passes overhead. The whole academy begins to panic and a beautiful, female alien appears from the UFO. She claims she traversed vast reaches of space in order to tie the knot with Yuusaku. Meanwhile, Yuusaku is utterly confused. As she tries to press him into marriage, she uncovers his secret stash of porn and begins using knowledge of cosplay from that in order to seduce him.

The other heroine, his childhood friend, joins in the fuss over Yuusaku caused by the alien’s mother, friend, rival, and even space pirates. On top of all this, secret agents from another country begin targeting the Aliens’ advanced technology…

[From the [Mangagamer blog](http://mangagamer.wordpress.com/2010/01/20/cosplay-alien/#more-256)]

## Characters
### Tenkawa Yuusaku (天川 優作)
- **Gender:** Male
- **Hair:** Brown
- **Eyes:** Hidden
- **Personality:** Carefree, Docile

### Aqulia (アクリア)
Aqulia is a female space pirate as well as an alien. She is the type who will never rest until she obtains what she sets her sights on, and this time her target is Yuusaku. She wears a bondage suit over her dynamite body. 

[From [url=http://www.mangagamer.com/detail.php?goods_type=1&product_code=34#characters]mangagamer.com[/url]]

- **Gender:** Female
- **Hair:** Blond, Long, Sidehair
- **Body:** Pale, Young-adult, Big Breast Sizes
- **Eyes:** Green
- **Personality:** Narcissist
- **Role:** Extraterrestrial, Not a Virgin, Space Pirate
- **Clothes:** Collar, Tricorn Hat
- **Voiced by:** Natsukawa Nanami

### Hoshi Shiori (星 志織)
Shiori is Yuusaku’s childhood friend and the other heroine of this game. She has long held affection towards Yuusaku, but until Larfa showed up, she held back her feelings and continued to be just friends. When Larfa appears, Shiori finally becomes honest with herself and starts her fierce attack on Yuusaku. She is usually quiet and subdued, but she gets very jealous when it comes to Yuusaku. With her mind now set, she starts taking bold actions she never would have before. She used to be a member of the tennis club, but she resigned from it. She also has a complex about her under-developed body.

[From [url=http://www.mangagamer.com/detail.php?goods_type=1&product_code=34#characters]mangagamer.com[/url]]

- **Gender:** Female
- **Hair:** Blue, Ahoge, Waist Length+, Straight, Sidehair
- **Body:** Teen, Slim, Pale, Small Breasts
- **Role:** Student, Childhood Friend
- **Eyes:** Blue
- **Clothes:** Necktie, Thigh-high Stockings, Detached Sleeves, Old Type School Swimsuit, Puffy Sleeves, Ribbon Hair Wrap
- **Personality:** Deredere, Possessive, Emotional, Jealous
- **Subject of:** Inferiority Complex, Kidnapping
- **Engages in:** Bondage, Marriage Proposal
- **Voiced by:** Minami Chiharu

### Larfa (ラルファ)
Larfa is this game’s main heroine, the alien trying to make Yuusaku her wife. She is the daughter of a space overlord and extraordinarily beautiful. Her breasts are on the large side and her bangs are actually antennae that form a heart-shape when she sees someone compatible and move to reflect her emotions. She is madly in love with Yuusaku and thinks about nothing but him. She is bright, simple, and straightforward. She’s also the type who becomes inflexible and loses sight of her surroundings once she makes a decision. This flaw is why some consider her a troublemaker. After seeing Yuusaku’s porn, she comes to believe that what she saw was normal for Earthlings. She possesses a bracelet with several functions such as instant costume change, short-range teleportation, and the ability to create a small space that the wearer imagines, as well as several other sex toys made from their advanced technology. 

[From [url=http://www.mangagamer.com/detail.php?goods_type=1&product_code=34#characters]mangagamer.com[/url]]

- **Gender:** Female
- **Hair:** Pink, Antenna, Twin Tails, Waist Length+, Straight, Intake, Spiky Bangs
- **Body:** Teen, Slim, Pale, Big Breasts
- **Eyes:** Amber
- **Clothes:** Hat, Half-Skirt, Miniskirt, Sport Bloomers, Pantyhose, Thigh-high Stockings, Maid's Dress, Bell (accessory), Nurse Uniform, Garter Belt Stockings, Blindfold, Cuffs, Detached Sleeves, Miko's Dress, Naked Apron, Body Ribbon, Ribbon Hair Tie, Garter, Santa Suit, Maid's Headdress, Name Tag, Police Officer Uniform, Nurse's Cap, Old Type School Swimsuit, Puffy Sleeves, Christmas Cap, Sailor School Uniform, Naked Shirt, Tabi, Knee-high Boots, Rope Bondage Harness, Strapless Mini-dress
- **Personality:** Deredere, Possessive, Naive
- **Role:** Daughter, Childhood Friend, Princess, Extraterrestrial
- **Engages in:** Cosplay
- **Subject of:** Kidnapping
- **Voiced by:** Mamiya Suzu

### Laylia (レイリア)
Laylia is Larfa’s mother and a space overlord. She looks warm and gentle, speaks slowly and seems rather stupid, making many wonder if she really is an overlord. She has Larfa’s best interests in mind, and tries to help Larfa win over Yuusaku, but her methods are absurd. To make sure he and Larfa have good sex, she tries to teach him the art of sex. She usually wears one of the bracelets too, and halfway through the story, she infiltrates their academy and takes over as their homeroom teacher. 

[From [url=http://www.mangagamer.com/detail.php?goods_type=1&product_code=34#characters]mangagamer.com[/url]]

- **Gender:** Female
- **Hair:** Pink, Violet, Long
- **Eyes:** Violet
- **Role:** Mother, Queen Regnant, Extraterrestrial
- **Voiced by:** Iida Kuu

### Mia (ミア)
Mia is Larfa’s childhood friend and rival. She is a sexy, furry cat-girl with cat-ears and a tail that move in reflection of her emotions. She wants to obtain everything Larfa owns, but doesn’t show any tenderness. She is the type who will do whatever it takes to achieve her goals. She tempts Yuusaku at every opportunity. 

[From [url=http://www.mangagamer.com/detail.php?goods_type=1&product_code=34#characters]mangagamer.com[/url]]

- **Gender:** Female
- **Hair:** Green, V Bangs, Spiky, Sidehair
- **Body:** Teen, Slim, Dark, Kemonomimi, Fang, Furry Tail, Big Breasts
- **Eyes:** Blue, Tareme
- **Clothes:** Thigh-high Stockings, Collar, Bell (accessory), Detached Sleeves, Panties, Tube Top, Body Ribbon, Hair Tie, Ribbon Hair Accessory, Paw Gloves, Fur Trim
- **Personality:** Selfish
- **Role:** Childhood Friend, Rival, Extraterrestrial, Cat, Not a Virgin
- **Voiced by:** Iida Kuu

### Vanilla (バニラ)
Vanilla is Larfa’s childhood friend and her best friend. She is a bunny-girlish alien and rather used to having sex. She has sex with Yuusaku in the name of teaching the heroines. She has a frank personality and is considered the big sister type. Her ears move in reflection of her emotions. 

[From [url=http://www.mangagamer.com/detail.php?goods_type=1&product_code=34#characters]mangagamer.com[/url]]

- **Gender:** Female
- **Hair:** Blue, Bob Cut, Shoulder-length, Straight, Blunt Bangs
- **Body:** Slim, Pale, Young-adult, Big Breasts
- **Eyes:** Amber
- **Clothes:** Suit, Collar, Bow Tie, Strapless Leotard, Bunny Dress, Fishnet Pantyhose, Usamimi Headband
- **Role:** Childhood Friend, Extraterrestrial, Not a Virgin
- **Voiced by:** Higashijuujou Asuka

### Hidaka Jun'ichi (日高 純一)
- **Gender:** Male
- **Hair:** Brown, Short, Parted to Side
- **Eyes:** Brown, Hosome
- **Body:** Teen, Pale
- **Clothes:** Trousers, Necktie, Shirt
- **Role:** Student, Friend, Popular, Honor Student

### Jii (ジイ)
An old man accompanying Larfa. He is about 120 centimeters tall and has a staff which is actually a laser swordstick. Although looks weak, Jii is pretty strong when he needs to be. He often floats in the air. 

[Translated from [url=http://www.getchu.com/soft.phtml?id=125941]Getchu[/url].]

- **Gender:** Male
- **Measurements:** Height: 120cm
- **Hair:** White, Beard, Moustache
- **Eyes:** Black
- **Body:** Old, Short
- **Clothes:** Robe, Hat
- **Items:** Shikomizue, Sceptre

## Shops
- [Official Website](http://www.tactics.ne.jp/~score/coseri/index.htm)
- [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ005714.html)
- [Getchu](http://www.getchu.com/soft.phtml?id=525685)

## Releases
### Japanese
- **2005-01-08**: Cosutte Alien -Yuuwaku no Cosplay H- Network Trial Edition - [Official website](http://score.nexton-net.jp/coseri/htm/_down.htm)
- **2005-01-28**: Cosutte Alien -Yuuwaku no Cosplay H- - [Official website](http://www.tactics.ne.jp/~score/coseri/index.htm), [ErogameScape](https://erogamescape.dyndns.org/~ap2/ero/toukei_kaiseki/game.php?game=4448), [Getchu](http://www.getchu.com/soft.phtml?id=125941), [DMM](https://www.dmm.co.jp/mono/pcgame/-/detail/=/cid=1029scr006/)
- **2008-04-24**: Cosutte Alien -Yuuwaku no Cosplay H- DVDPG Edition - [Official website](https://web.archive.org/web/20161209072455/http://www.dennoclub.com/TitleList/dcpg/DCPG166/dcpg166.htm), [Getchu](http://www.getchu.com/soft.phtml?id=525685)
- **2011-03-11**: Cosutte Alien -Yuuwaku no Cosplay H- Download Edition - [Official website](http://www.tactics.ne.jp/~score/coseri/index.htm), [DLsite](https://www.dlsite.com/pro/work/=/product_id/VJ005714.html), [Gyutto](https://gyutto.com/i/item52592), [Digiket](https://www.digiket.com/work/show/_data/ID=ITM0052097/), [DL.Getchu](http://dl.getchu.com/i/item1003090), [DMM](https://dlsoft.dmm.co.jp/detail/ggs_0550/)
- **2018-01-15**: Cosutte Alien -Yuuwaku no Cosplay H- - [Official website](http://drops-market.com/products/detail735.html)
- **2020-04-24**: Cosutte Alien - [Official website](https://oo.parts/title/GpYQHXgfMI2mloWAZLoR)
- **2023-06-25**: Cosutte Alien -Yuuwaku no Cosplay H- - [Official website](https://rapidgator.net/file/f6f72b688c447e0572b0b9cf9a6584de/Cosutte_Alien_-Yuuwaku_no_Cosplay_H-.rar.html)

### English
- **2010-02-20**: Cosplay Alien - [MangaGamer](https://www.mangagamer.com/r18/detail.php?product_code=34)

## Tags
ADV, High School, Comedy, Royal Heroine, Male Protagonist, Multiple Endings, Deredere Heroine, Protagonist's Childhood Friend as a Heroine, Nukige, Fictional Modern Day Japanese Town, Reverse Rape, Princess Heroine, High Sexual Content, Catgirl Heroine, Comedic Love Triangle, Group Sex of One Male and Several Females, Student Heroine, Early Sexual Content, Heroine with Sexual Experience, Adult Heroine, Alien Heroine, Rabbitgirl Heroine, Big Breast Sizes Heroine, Student Protagonist, Dark Skinned Heroine, Bad Ending(s), Defloration, Footjob, Boobjob, Cosplay, Heroine with Visible Panties, Sixty-nine, Blowjob, Science Fantasy, Pirate Heroine, Lots of Choices, Intercrural Sex, Naked Heroine with Apron, Balls Sucking, Ejaculation Choice, Cowgirl, Sudden Love Interest Appearance, Soapy Massage, Twin Boobjob, Sexual Cosplay, Heroine with Big Breasts

## More Games from Score
- [Sensei Da-isuki](https://pinovel.net/v285)
- [Miko-san Da-isuki!](https://pinovel.net/v2839)
- [Sensei Da-isuki 2](https://pinovel.net/v279)
- [Cosutte Alien -Yuuwaku no Cosplay H-](https://pinovel.net/v3269)
- [Magical Teacher Sensei wa Majo?](https://pinovel.net/v4962)
- [Yakuchu! ~Tadaima Biyaku Kaihatsuchuu~](https://pinovel.net/v4127)
- [Goshujin-sama Da~isuki](https://pinovel.net/v961)
- [Zettai★Maou ~Boku no Mune-kyun Gakuen Saga~](https://pinovel.net/v2885)
- [Crayon Tulip ~Chidori to Koruri no Yuuwaku Jugyou~](https://pinovel.net/v4907)
- [Girls Be Ambitious!](https://pinovel.net/v12435)

---
*View the full details at [pinovel.net/v3269](https://pinovel.net/v3269).*

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