This story takes place in an alternate reality where humanity is in the verge of extinction by a virus that killed all men, but made all women Thicc. You will play as the last human that was born on earth and experience a gigantic surprise. Gigantic... Surprise.
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