The 26-year-old Kitako (Yuko Oshima) is a romantic express sales attendant going back and forth between Shinjuku and Hakone. She works hard and can be trusted. In contrast, in real life, there is no way for a boyfriend (Masahiro Wada) who holds out his clothes and opens his mouth. On this day, Bao Zi received a letter from his mother (Hui Ximoutian). At that time, after the parents divorced, the mother gave up and messed up the relationship between men and women, resulting in a growing spiritual gap between mother and daughter. When Bao Zi was a little upset by this letter, she encountered Yoichi Sakurata, a strange man suspected of theft on the train (acted the role of Xiaoji Okura). In the process of entangling with Yingting, they missed the train and were forced to linger halfway. During this period, Yingting read the letter thrown away by the bowl and judged that the girl's mother tried to commit suicide. In order to prevent this terrible situation from happening, he forcibly embarked on the journey to find his mother with a bowl.