When I launch either Koikatu.exe or InitSetting it alredy starts installing inside C:.
I moved the .RAR to D:, but I can't install it there really.
I dunno how to properly describe it other than I alredy have the .RAR, but can't run it bc it installs itselfs in C:
In order to start playing, you need
1. Download repack
2. Extract from the archive to any place (to any disk in a separate folder)
3. Run Koikatu.exe and play.
The main game will be contained specifically on the disc that you choose. On disk C will install small files necessary for the functioning of the game.This happens when you install most modern games, and usually you should not pay attention to it.
InitSetting verifies that your system meets the requirements of the game. This is usually not an installation, but a compatibility check. This component is not necessary at all. (only when there are problems with the start)
In most cases, downloading, unzipping and playing is all you need to do. If you have problems starting, check if your computer meets the requirements of the game and make sure that you unpacked the archive correctly...