We Know the Devil (Steam key / Region Free)

https://store.steampowered.com/app/435300/We_Know_the_Devil/

WE KNOW THE DEVIL is a visual novel about teens reluctantly fighting the devil at summer camp.
Follow meangirl Neptune, tomboy Jupiter, and shy shy Venus as they get to know each other--but one always gets left out.

Activating the steam key

1) You must download and install Steam http://steampowered.com/download/SteamInstall.msi (if not already installed).
2) Create a new account on Steam or go to an existing one.
3) Select "Activate via Steam ..." in the "My Games" section, and enter the key received after payment.
4) After activation, the game will appear in your list of games and you can install it.

Please leave feedback after successful activation of the game.