Eri and his wife moved to a rental apartment in Tokyo after their husband worked at the head office. His kind-hearted neighbor Kanno runs a shady investment business from home. Kanno, who liked Eri at first sight, approaches Eri and tries to satisfy her lewd desires. On the other hand, Koji, who was busy working at the headquarters, was unaware of the fact that he was about to become sexless and the relationship between his beloved wife and Kanno.
