jade please don't invite strange unhygienic boys into your apartment omg

He'd probably casually ignore her/be distant at first since he's technically not supposed to be there BUT if she bugs him enough he'll talk to her all cool like some coolguy

but it's okay because after 30 seconds he'll reveal himself to be the huge loser with no control of his life he is. Once they get to know each other better he'll probably show up at her doorstep to use her shower every once in a while... And gently break in to use it when he's desperate and she's not around, I'm so sorry Jade plz don't regret?? He'll stop if she yells at him maybe