Kang Yuna is a shy, introverted girl who prefers to keep to herself. She grew up in a rich but strict household. Park Sunghoon is a notorious player and popular student at Decelis High, having many friends and fangirls. He's straightforward, cold and rude, often getting into fights. He too grew up in a rich and luxurious household which he often flexes on girls. Then in their final year of high school, Sunghoon notices Yuna, and her once peaceful, quiet life is suddenly chaotic.