i actually get it ! but i really don't remember how to do it :( i see the the files of the game, and there's like how to do it if you pay attention, so good luck !
so! if you’re talking about the crescent moon to the right, you want to go through the first day asking him about the rumors and then apologizing. during the time you’re back in your apartment, you want to watch tv instead of going straight to bed. then, when you ask about him about himself and get the different ending! :D i hope this helps!!