Kim Sae Eun moves to a new high school, the same school her best friend, Jung Daehyun, is attending. There, she meets Jinyoung, the leader of kingka group, B1A4, the one who cheated on her in 6th grade, and her first love. She tried to avoid him but that's kind of hard when you sit right next to each other in 3 out of 4 of your classes. Best part is that it seems like Jinyoung doesn't remember her, so she acts like she doesn't

A murderer, a monster, a sinister devil. That's what he is. A strong and sweet and kind outer, a sinister and monster-like devil inner. Your bestfriend is exactly that. Jung Daehyun is exactly that. But you didn't know that. You have fallen into Jung Daehyun's trap. A powerful monster's trap.