Tsukioka Natsu was dating her classmate Nagumo Suiki during her college days, but one day when she was applying for a job, Suiki suddenly broke up.Seven years later, Xia learned about Shui Ji's death from a friend in college.Xia, who had never seen each other after being broken up and had no real sense of the fact, went to the funeral, where he met a little girl named Hai. Xia couldn't hide his surprise when he learned that she was Shui Ji's daughter.Then, Shui Ji's mother told him that he was Hai's father.Shui Ji gave birth to a child in a place unknown to Xia and raised her without saying anything. Xia thought about the seven years Shui Ji and Hai spent...