Ayato was your best friend, but you had a problem with one person stalking you.It never turned out who it was.

one day you went for a walk with Ayato, bought a drink and after taking a few sips you felt drowsy.But.. was there a smirk on Ayato's face?..

You woke up already in a dark room and a dark figure was standing in front of you..Ayato? He's been your stalker all this time.