Luhan is on a mission to break Oh Sehun's heart! Having found out that his most cherished-loveable sister's heart had been torn and broken by the biggest playboy -Oh Sehun - Luhan decides to take action and play his game.

Straight A student -Oh Sehun- is the schools hottie - the guy who all the girls fall head over heels in love with. F student - Lu Han - is the schools most idiotic person who is picked on for his naiveness. What happens when a straight A student meets a failing F student?