Mana travels to a hot spring with her husband and father-in-law for a family trip, never expecting it to become the stage for an unexpected NTR encounter. Unknowingly drugged with an aphrodisiac laced into her drink at dinner, Mana's body heats up as her resistance fades, gradually transforming her into a lewd, uncontrollable version of herself. Losing all rationality, she surrenders to her father-in-law's bare cock beside her sleeping husband, descending into a creampie-craving sex slave. A shocking narrative capturing the precise moment familial bonds are shattered.