Summoner's Cafe is a visual novel about a young man who starts a new cafe to fulfill his grandfather's wishes where he summons "spirits" to be the waitresses. There are five monstergirls you interact with over a period of six days as you navigate how to deal with each of them and their various kinks.
In order for you to be able to install this game, you need to enable (allow) installation of applications from unknown sources (Unknown sources) in the phone settings. Usually this item is in the Security section