After marriage, Takahiro had always harbored complicated feelings toward his stepmother, Asahi. Unable to confront them honestly, he suppressed his attraction to her and continued living day to day. Then one day, his wife went on a trip, leaving the house empty, so Takahiro asked Asahi to come over and take care of things. As a result, Asahi came to stay at the house and began spending time in front of Takahiro. With his wife away, the chance to be under the same roof as the stepmother he'd secretly desired finally arrived. Takahiro's pent-up emotions exploded in that single moment. His relationship with his stepmother began taking a new turn.