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all characters are at least 18

Koikatu [edit]

Install Guide

FAQ & Technical Help


Chara Studio


Koikatu cover.jpg
Developer: Illusion
Release date: April 27, 2018
Theme: School, Sandbox
HF Discussion: Hongfire
AS Discussion: Anime-Sharing
Fanpage No Fanpage
Discord Discord
HF Patch - Plugin - Illusion - Koikatsu

Koikatsu! aka Koikatu (コイカツ! in Japanese) is an eroge high school simulation akin to SchoolMate and Artificial Academy created by the Japanese H-game company Illusion. The game was released on April 27, 2018. The story mode of the game revolves in the player (a male) going to an all girl's school in an attempt to get the girls in the school have relationships with the player. Koikatu also includes a character creator and a studio mode for making scenes, posing your character, or just taking screenshots of them.

The player can make characters (aka cards) at the character creator, and put them into their school (up to 100 of them via a plugin (38 in the vanilla game or if the plugin is not installed)), use Free-H with them, or use them to make a scene in CharaStudio. At the school, you can talk and get along with the girls you added to the school, improve the club, or do H with the girls.

H is mostly 2P (Male x Female), although a DLC adds 3P (2x Female + Male) and a bonus that came with pre-ordering Emotion Creators added 3P (2x Male + Female) rape. In H, you can caress the girl with your hands and toys; let her service you using her hands, breasts, or mouth; or insert into her.

Koikatsu Party
(コイカツ!/ Koikatsu Party)
KoikatuParty cover.jpg
Developer: Illusion
Release date: June 10, 2019
Theme: School, Sandbox
HF Discussion: Hongfire
AS Discussion: Anime-Sharing
Fanpage No Fanpage
Discord Discord
HF Patch - No Plugin - Illusion - Koikatsu Party

Party (International Version)

Koikatsu Party is an English localized version of the game Illusion released on Steam, a US-based distribution service for games. It is largely the same as Koikatu except for changes required for the translation. The main game is not available in the Steam release because of Steam refusing to allow Koikatsu with these features to be released (presumably because of the school setting). Illusion released a "Special Patch" to restore these features on the same day on their website. They also released another "Special Patch" for the "After Party" DLC.


System Requirements
Minimal Recommended
OS 7 /8.1/10 (64-bit) 7 /8.1/10 (64-bit)
CPU Intel Core i3 4000 Intel Core i5 4000
Disk Space 20 GB 20 GB
DirectX DirectX 11 DirectX 11