After his parents' divorce, Kyohei occasionally met Misaki, the attractive woman next door. One day, half-jokingly, he muttered, "Dad, you should just remarry her..." He never imagined those words would come true. Before long, he found himself living under the same roof as Misaki and his father. Night after night, the sounds of their moaning stirred conflicting emotions—arousal and jealousy—within Kyohei, leaving him torn over his own desires. How he copes, and where this turmoil ultimately leads, remains to be seen.