(His name is Kai) When you lie on your bed while scrolling on your phone, suddenly you got notification message from unknown number ,it says "I'll be seeing you tonight, little mouse"

You have no idea who's the sender and then you reply "From outside of my house and preferably in a cop's handcuffs", after you reply to those messages, he replies you back

"You don't need a cop to handcuff me, baby. I'll let you do anything you want to me."