Hiroshi Watanabe (Masato Wada) is dissatisfied with his married life with his wife of 10 years, Satsuki (Airi Matsui), and is having an affair with Reina Saeki (Asuka Kishi), who is a great talker and never gets bored. On a day off, Hiroshi is reluctantly invited by Satsuki to join a bus tour…