Married woman Reiko falls under a hypnosis spell, becoming completely obedient to her brother-in-law as her consciousness grows hazy. Gradually, she begins moving in sync with his words, eventually taking his cock into her mouth. Unaware of her own actions, she simply follows her brother-in-law's commands. In this state, she is entirely under his control, her will completely stripped away. Feeling his tongue, Reiko loses all sense of self. Drowning in pleasure, she realizes there's no turning back—she has fully submitted to her brother-in-law's domination.