Japanese romantic comedy. Shohei Sugiyama (Koji Yakusho) is a typically strait-laced Japanese businessmen who, passing by in his commuter train one day, glimpses a beautiful young woman, Mai (Tamiyo Kusakari) through the window of a dance school. Obsessed with her, Shohei enrolls in the school and meets instructor Mai, who at first mistakes Shohei for a philanderer. To her surprise, however, Shohei is a naturally gifted dancer interested in an artistic partnership only, and Mai begins training with him for a competition. Meanwhile, Shohei becomes familiar with his eccentric fellow students, including one person that Shohei already knows, a co-worker (Akira Emoto) who blooms in the dance sessions as a bewigged master of rumba. As dancing is frowned upon in Japan as a frivolous enterprise for a respectable businessman, Shohei keeps his sideline hobby secret, leading his wife to believe that he's being unfaithful and to hire a private investigator to follow him.