She is a beautiful woman, but her destiny is destined to be rough. He and her were childhood sweethearts, but due to an accident ten years ago. Keep them one side apart. Ten years later, she is the daughter of M&C, the largest entertainment company in City A, and he is a member of South Korea's popular brutalist idol group 2pm. By chance, she went to study in South Korea, and the thread of fate brought them together again. Will she remember him buried deep in her memory? Can she bear what happened back then? Will he recognize the little girl from back then, and will they go back to the past? What kind of sparks will they create when they meet again 10 years later? At a certain moment, do you ever want to go back to that time, to a certain day in a certain month of a certain year...