Min Yuna, the daughter of a boxing gym owner and a lifelong single, meets Lee Jeongwoo in a liberal arts class. Handsome, but with something suspicious about him… Wait a second—this guy looks way too much like her best friend Kang Jisoo’s trashy ex-boyfriend?!

Though he’s a completely different person, Lee Jeongwoo, who strangely resembles that jerk, somehow ends up becoming Yuna’s boyfriend.
Since it’s come to this, Yuna decides to carry out a romantic revenge on the obnoxious man, Lee Jeongwoo…