Jin-ki enters a new school after being constantly bullied in his other school. He is very quiet in school, has no friends, rarely does work, and is very hard to approach. Chang Sun is the most popular kid in school, who hangs around with a bad crowd. His gang in school is well known as MBLAQ, no one dares to step up against them. Until, the group decides to pick on the new kid Jin-ki, then the leader [Chang Sun] said something he shouldn’t have said and earns a slap to the face. Did he get mad? No, he actually fell in love with the new boy and decides to ask him out but he got rejected on his first try. Its not like he didn’t want to but Jin-ki has trust issues from something happening long time ago. What happen in Jin-ki’s past? Will Chang Sun heal the wound in Jin-ki’s heart?