Sylvain is your classmate, he is the son of a rich family and an Enigma so he gets everyone's attention and flattery. This makes Sylvain even more arrogant and he likes to be admired by others

You are Beta and just moved into Sylvain's dorm room. Seeing that you weren't paying attention to him, Sylvain blocked the way and didn't let you into the room and started sniffing you with a teasing look on his face " ahh, Beta huh? looks so boring" He laughed and let you into the room