Jessica, the y princess-like girl who is very popular in Seoul High, a school where children from only prestigious families go to. Being the only daughter of Jung family who owns the Korea Bank makes her feels like she deserves to do anything she wants. In fact, she is the most influential person in Seoul High and even the teachers let her do her things. She has an enemy since she was a kid, Sunye who is known for her kind angelic heart and face. Every person that Jessica bullied will be helped by Sunye. And the fact that Sunye is more intelligent and more admirable than her makes her hates Sunye to her guts. She has a boyfriend whom her family tied her up with since she was a child which is Taecyeon. Both of them believe that they will be married someday. Jessica prioritizes status over anything like any other daughters of wealthy households do.

Jiyong, the boy who goes to Gangnam High, an all-boy school which practices military-like discipline is suddenly involved in an exchange students program for a year to Seoul High. His family is very strict with discipline which instills in him the hard rock-like personality. He doesn’t speak much, prioritize discipline and study over anything like any other army children. This makes him quite awkward with girls since he never attends to a co-ed school like Seoul High. He hates bad girls so much and admires angel-like girls which he believes he will find one day to be his wife. With his entrance to Seoul High, he found the girl that he always dreams of, Sunye.

Sunye, the angel-like student in Seoul High is a very different student. Although she is the daughter of Korea Intel Company, she holds to her principle that manners are very important no matter who you are. She always trying to be friend with Jessica but all Jessica did are rejecting her kind offers and humiliating her whenever she could. Students and teachers adore her so much since she always helps them in any means she could especially to those that Jessica always bullies. She never uses her status to get anything she wants instead she always works hard for it. She never thought about love, but Jiyong’s comfortable aura makes she unconsciously falls in love with him.