In the autumn of Heisei 26, a young man named Daisuke returned with his wife to her parents' home for the first time in a while. Upon seeing his wife's mother, Misako, after so long, he was instantly captivated by her mature allure, his desire quickly stirring. Staying together in a private house for a two-night, three-day visit, sharing the same roof, his restraint began to crumble. Unable to hold back any longer, he found himself breathing heavily behind his mother-in-law. As tension mounted, his suppressed feelings surged, driving their relationship toward an unexpected and passionate turn.