Fate Sex Night

The main character of the game moved out from his parents and now lives alone. Everything seems to be fine, but he feels a little lonely. Therefore, he decided to invite a girl of easy virtue who would fill his emptiness. Finally, the moment has come and she knocks on the door. But not just a girl appeared on the threshold, but Saber herself from Fate/stay night. Do everything in your power to make sure she never forgets this night.