[Oh. Rin isn't very good with emotional things, but in a way, she understands Mizuki and her worries. It was obvious that this roommate of hers was special, and she can only frown as she hears Mizuki's voice. Her free hand grasping the fabric of her dress, wondering what she could do to help ease her worries.]

I know it's not the easiest to tell that to someone... So thanks for opening up to me, Mizuki.

I'm not the best at this sort of thing to be honest with you, and I know telling him that you're worried isn't easy... But if he's acting weird, maybe observe him a bit more in secret?