Neighbor Kato comes to the Hirai residence for repairs. Worried about Kato's wife, who hasn't been seen lately, Hiroko listens as he confides that his wife has left him and he's lost his job. Shaken by his story, Hiroko gives in to Kato's advances. Ultimately, though she resists, she ends up having sex with him, and what follows spirals into a far deeper and more complicated situation than she ever imagined.