I cant remember the title of the game, but I do remember parts of it. It was a 3D school setting like waifu academy and the principal or administrator wanted you to keep an eye around the school. It had harem like elements. One girl was the super popular model type that was into swimming and you would ride home with her on the train. Her best friend was the slut of the game that would blackmail you if or if you would have sex with her. One of them had a sister who is a futa, if you had the option on, and if you accepted the futa sister the girl would be happy.
