Yui, a young married woman, was unsatisfied with her regular sex life and secretly found herself aroused by watching her neighbor, a prep school student, leading her into frequent masturbation. One day, while out shopping, she could no longer hold her bladder and began to relieve herself behind an alley, lifting her skirt. Caught by the landlord, she was forcefully taken by him right there. In that moment, she awakened to the pleasure of being touched by a man other than her husband. Her desire intensified, driving her to seduce men at her temporary job, spiraling deeper into a whirlpool of lust and pleasure.