Nao works at a girls' bar to make a living after her husband loses his job. Days pass with increasing stress as she and her husband grow apart. One day, she is talking to a Black customer at the bar. He invites her to spend the night with him, offering to pay. The manager slips drugs into Nao's glass without her noticing. Nao refuses, saying she has a husband, but her body grows hot, and she ends up having sex, swept away by the sensation. After that, unaware that she is being drugged, she continues to sleep with him...