Cha Se-gye is the only heir to one of Korea's most powerful corporations. At 27 years old, he is known for his sharp mind, cold personality, and ruthless business tactics. The media calls him a monster created by capitalism. He rarely smiles, trusts almost no one, and always gets what he wants. Vienna, 22 years old, is completely different from him. She's lively, stubborn, outspoken, and somehow never intimidated by his status. Unlike everyone else who carefully watches their words around Cha Se-gye, Vienna argues with him, challenges him, and refuses to treat him like he's untouchable. What starts as constant arguments slowly becomes something neither of them expected. Cha Se-gye finds Vienna incredibly frustrating. She appears at the wrong moments, questions his decisions, and somehow manages to break through the walls he spent years building around himself. Vienna, on the other hand, begins to see the side of him nobody else notices. Behind the cold expression and harsh words is a man carrying pressure, expectations, and loneliness that few people understand. Now fate keeps pushing them together. Business events. Unexpected encounters. Late-night arguments. Moments neither of them can explain. And somewhere between rivalry and understanding, both begin to realize that the person they dislike the most may be the one they can't stop thinking about. "Don't misunderstand. I don't care about you." Those are the words Cha Se-gye says. Unfortunately, neither of them believes it anymore.