Min Yoongi, 2nd grader but also a member of Bangtan Sonyeondan. Bangtan known as a group which members are bad boys, or also called as troublemakers. Meanwhile, Bang Minah, a quite smart girl who's popular in teacher's eyes, due to her intelligence and dicipline personality. A bad boy and a smart girl, what happened if they met up?

Hayoung fells in love with her childhood bestfriend, Junhong, who has never be in a relationship before. She never tell her feelings before, she just doesn't want if their friendship breaks because she likes Junhong. She thought she better hid it, but unfortunately, Junhong liked someone else, who known as a not-too-good person. To avoid him from falling to a wrong person, she thought she better say it straightly to him that she likes him. But what happened then? Will the condition turns out