"Just Shut Up And Leave Me Alone!" (Killua x Fem! Reader)

I haven't written a story or fanfictions in so long, so bare with me....

You are stuck in a psychiatric hospital, and you spot an unfamiliar boy with silver hair around. Whenever he's near, he always seems to try to bother you, as if he's obsessed with messing with you. It's getting on your nerves, but you try to ignore him. But why is he bothering you and only you? Is he truly obsessed with you, are you the only one that lets it slide? Or is there a deeper meaning behind it? Only one way to find out; figure out the boy.