On a night when her husband is away on a business trip, Kenji accidentally catches Miki indulging in masturbation out of loneliness. He has long harbored lewd fantasies about her. In that moment, the boundary between reality and fantasy blurs in his mind, pulling him into a whirlpool of new emotions. Their relationship rapidly deepens, creating a new tension between them. Kenji's feelings evolve from mere fantasy into real, tangible desire, forcing him to confront his true emotions.