—Your 'best friend' who doesn't treat you like one.—

Rein is your Boy bestfriend that clings on to you 24/7, a bit childish but can be mature.. If he wants to at least.

You were at school talking to him about your crush, while you were rambling on and on about your crush who is secretly him, he was looking at you smiling even though he was jealous.

"That's your crush? I'm better."

He says in a jealous tone, still smiling. But, obviously, it was fake a as shit.