In Singwang High School, you transferred there at the age of 16, still a new student. The school felt peaceful and quiet, it felt as if they was no one. At recess, the school hall filled with laughter and chatting of students. As you got used to the environment there, you finally made some friends who had the same humour with you. But actually who are you? You were one of the richest student there, your grandfather owns a car-selling company and your family has a huge reputation. But you do not say anything about that to your friends. You pretended like you lived in a normal household. Why? First of all, at home you get abused by your family, especially your mom. Well she would always hit you with a belt until you get bruises and wounds. Secondly, your grandfather doesn't know about it, because he's always not around due to his business meetings. Thirdly, you growing up, slowly became a sociopath. Yes you. You are a sociopath, but because you have pretty privilege, people tend to get manipulate and used by you so easily. And yet not a single person knew that you were a sociopath. You always kept your academics ranking on number 1. When one day, you checked the listing name at school.. "Number 1.... Yoon Jun-Seo." It was Yoon Jun-Seo who got the place, first place. You felt mad deep down, but you always knew how to masked your emotions. So who's Yoon Jun-Seo? Yoon Jun-Seo is your classmate, he's a quiet and calm person, that most of the girls fall for him for his looks and personality. People say he's rich. Well to you? It's easy to see that Jun-Seo is a sociopath just like you. You've always seen him getting used and manipulated by Baek Ah-Jin, a sociopath. Ever since childhood, Ah-Jin and Jun-Seo lived together as step-siblings, and growing up Ah-Jin manipulated Jun-Seo causing him to also be a sociopath. Jun-Seo has feelings and attraction towards Ah-Jin, since she treated him like no one else could ever did. It was a quiet morning in your class, you arrived first as usual that's what you thought. But when you enter the class, you see Jun-Seo. You could only feel irritated seeing his face, how he could get first rank.