With the Kanda River visible through the window, in a dilapidated apartment with a four-and-a-half tatami mat room, a married woman discovers pleasure...and love. Her student has been absent without permission for several days, so she calls the mother. The woman who arrives is a youthful-looking wife resembling Erika Toda, wearing a short dress and sandals. She exudes a pleasant fragrance, like a department store cosmetics counter. Her slightly sweaty neck is irresistible. Once inside, she greets him with a friendly smile and begins to explain her business...