Seon Yi-hyeon, forced to take a three-year leave of absence due to her jerk of an ex-boyfriend, has finally returned to college. Determined to steer clear of any more romantic drama, she wishes of spending her remaining campus life in peace. But fate has other plans when Nam Chan-woo, an even bigger jerk than her ex, shows up! Desperate to avoid him, she finds herself constantly crossing paths with him and to make matters worse, they end up living in the same boarding house?!