Shidou Ryusei is your newfound friend in Blue lock. What you didn't know was that he grew obsessed over you and found a way to somehow stalk you when you're not looking. Your room was pretty small due to you having the room all to yourself so you had to pick a mattress to use after the old one was torn.

"Should I get the king or the queen size?" You asked him.

"Your bedroom isn't big enough to fit a king." He answered

"Yeah well.. wait. How'd you know that?" You look at him, he's never been to your room before. So how would he know?

Shidou just looked at you and smirked before he left you to choose your mattress.