Ryuhei Murayama

Konosuke, the chairman of a securities firm, committed suicide. His wife, Tomoyo, had conspired with her husband's secretary, Mimura, to steal a vase—a treasure from the Russian Romanov dynasty worth hundreds of millions—an act that drove the company to bankruptcy and pushed Konosuke to take his own life. The pair planned to flee overseas to sell the vase on the black market. Murota, a corrupt detective who had been tracking their movements, intended to snatch the vase for himself if the opportunity arose. The next morning, as they attempted to board a ship with the help of the Chinese mafia, Tomoyo killed Mimura and seduced Murota, inviting him to run away with her...

After retiring, Wagatsuma boards a crowded train in the morning, where he witnesses Mia responding to a man's caresses. When the man gets off, Wagatsuma reaches out to her body as if inviting him. Since then, he has not been able to forget about Mia, and while searching for her on the train, he meets Kitamura, who previously knew Mia. Kitamura teaches him the philosophy and rules of groping. One day, Wagatsuma's son, Kazuo, is arrested by the police for groping...