Min Yu-na, the daughter of a boxing gym owner and a lifelong bachelor, meets the handsome but somewhat fierce Lee Jung-woo in a liberal arts class. For a moment, doesn't this man resemble her best friend Kang Ji-soo's trashy ex-boyfriend so much?! Despite being completely different, Lee Jung-woo, who bears a striking resemblance to her, becomes a lover of the uncanny, undeniable Lee Jung-woo. This leads Min Yu-na to decide to take romantic revenge on the unlucky Lee Jung-woo...