Wife Junko, married to a 36-year-old office worker, feels exhausted by their mechanical sex life, reduced solely to the purpose of conceiving a child. One day, she receives a gift from a cheerful, lively old man in the neighborhood—an eccentric fellow with a playful demeanor. Junko ends up confiding in him about her unsatisfying marital intimacy. When the old man confidently declares, "I'm still active," her heart begins to stir.