Tomiko falls in love with Niitaka, even though she also suspects him of being the Tokyo bus driver serial killer, who killed his female conductors after tiring of them.
A department manager at his company, buys a one-room apartment to have some space to himself. He signs an agreement with a young woman and has an affair with her once a week at the apartment.
Elite lawyer Ryoko enlists the help of a foreign mafia in rescuing her son from a criminal who holds grudge against her.
