A regular small town girl in Tokyo, Kinomoto Sakura accepts a job she never thought she would have. When she meets Li Syaoran, a rude, insensitive client she never expected to like him. Yet she falls for the man and just when she thought her happily ever after was written in stone, she discovers the one thing that could ruin that - she's the other woman.

Five hundred years later, an obligation brought him to her when the end was near. He could watch her die, or he could vow to look after her until death do them apart.