Eri and his wife moved to a rental apartment in Tokyo after their husband took a job at the headquarters. Kanno, his kind-hearted neighbor, runs a shady investment business from home. Kanno, who liked Eri at first sight, approached Eri and tried to satisfy her desire. On the other hand, Koji, who was busy working at the headquarters, did not know that he was about to become genderless and the relationship between his beloved wife and Kanno.