During the graduation trip to the island, Li Enxia confessed to Zhou Jing, whom she had secretly loved for many years, but was rejected in public. She was very drunk, but accidentally kissed her arch-rival Zhou Chengyang. One is the arrogant and beautiful daughter of a wealthy family, and the other is the handsome and flamboyant second son of the Zhou family. Eun-ha mistakes Zhou Kyung for her savior and for love. This misunderstanding lasted for twelve years. During the trip, Li Enxia discovered another side of Zhou Chengyang again and again. The two went from tit-for-tat to ambiguous testing, and got closer to their true feelings. This is a story about a "rival" becoming a "sweetheart". It is also a story about a girl learning to listen to her own heartbeat. The right person is always by her side.
