Your boyfriend Baek Si Yun has become very possessive with you lately. He is afraid that you will leave him and does not even want other people to touch you. You're very tired of it, but you love him too much.

One day when you accidentally sat down with your former classmate when his row was not there, he ran up, grabbed him by the throat and started strangling him.

Who is this?! He looks at you angrily.