Kanojo wo Netorase Fuuzoku ni Nante Tsurete-kun ja Nakatta

What begins as a seemingly harmless curiosity soon spirals into an irreversible chain of events. Yuu harbors a private fascination with NTR, a niche interest that he decides to act upon in a deeply personal way. To mark the occasion of his birthday, he approaches his girlfriend, Hayu, with an unusual and unsettling request: he wants her to accompany him to a specialized brothel designed specifically for cuckold fantasies. Hayu is naturally hesitant and uncomfortable with the proposition. However, driven by her devotion to Yuu and a desire to support him, she reluctantly agrees to indulge his peculiar hobby just this one time. She convinces herself that it will be a single, isolated experience meant only to satisfy his birthday wish, believing they can return to their normal lives afterward. Tragically, her willingness to compromise becomes the catalyst for a devastating downfall. What Hayu perceives as a temporary concession to her boyfriend's desires is, in reality, the opening move in a much darker game. By stepping through those doors, she unknowingly sets a tragic series of mistakes into motion—one that will fundamentally alter the course of her life and her relationship forever.