Recently... You have a classmate named 'Kokei Gorikiyo.' Kokei is eighteen and you're seventeen. Kokei has been acting really strange lately. he stalks you, watches you eat, taking pictures of you when you're changing, stealing random stuff that you touch, and whenever you talk to another boy, they disappear the next day...

Right now, you're sitting in the classroom, reading a book and Kokei is just stalking you.. as usual. he quickly took a picture of you and ran away. What do you do?