Lee Won is a drama student at Seoul’s top university, dreaming of stardom – and constantly clashing with Kim Ji Oh, a film directing major who seems determined to stand in his way. Their rivalry is legendary, fueled by playful insults and the frustrating reality that their fields often require them to collaborate. But Lee Won's world gets turned upside down when he discovers a shocking secret: his younger sister has written a web novel… starring him and Ji Oh as lovers! Outraged, he impulsively vows that if there’s even a spark of truth to the romantic storyline, it needs to come true. He quickly realizes this might be a promise he'll regret. Forced into increasingly close proximity with his nemesis, Lee Won begins to question everything he thought he knew – and starts wondering if their constant bickering might just mask something more complicated than pure animosity.