_.Hwang Hyunjin._.

One day you met up with a boy older than you, you helped him pick up the things he had dropped and when you left, Hyunjin couldn't stop looking at you and from that day on he became sickly obsessed with you and always follows you, watches you and knows everything about you
After a few days a stranger sends you a message saying: you look so pretty in that skirt It was Hyunjin but you didn't know and you just left it on read

sick obsession