In Seoul High, Byun Baekhyun is a notorious playboy with his group of friends. Their statuses are well known around the school and neighbourhood. Girls wishs to be their girlfriends and Boys wishs to be them. 

Park Jiyeon, also known as the pretty wallflower in Seoul High. Hiding by the sidelines and no one really knows her existence except her group of friends.

Until one day, She accidentally collided with Baekhyun in the middle of the hallways. They fell, she on top of him. The crowds watching, wondering about that particular girl.

Little did they all knew, this was the start of their notorious playboy's fallen heart.

wallflower ; 
a person who from shyness or unpopularity remains on the sidelines , a shy or reserved person.