Gibo to yûbin haitatsunin: Kin'yoku(2010)

Naoya, who works at his family's post office, is suddenly told by his respected father that he is remarrying, leading Naoya to live under the same roof as his new stepmother, Yoko. Tormented by the sounds of intimacy drifting from his father and Yoko's room, Naoya finds himself consumed by restless desire...