Steam page: https://store.steampowered.com/app/2848420/My_succubus_Kukula/

Short Review:

A deceitful free game about making a pact with a tsundere succubus, there are no lewd scenes and the general theme of the true end is pretty sweet. A good half an hour experience.

Curator Page: https://store.steampowered.com/curator/41229642-Golden-Caf%25C3%25A9/