土郎はある夜新宿でチンピラにからまれていた少女を助ける。事情を聞くと彼女は、社会的名士だが冷めた関係の両親に反発して不良になろうと夜の街に来たと言う。土郎は彼女の両親に会うが・・・。
Three months ago on a night out in Kabukicho, Yamaoka and the Culture Department rescue the teenager Yoko Nishio from some men who were harassing her. She explained that although her father Yasukaza is a famous architect and her mother Yoshiko runs the Bisai Cooking School, her home life is unhappy.
