Three years into her marriage, married woman Nao struggles with her relationship with her husband. After discovering his infidelity, overwhelmed by loneliness and a desire for revenge, she begins a secret, unconventional job. The job requires her to meet someone whenever they express the desire to see her, once a month, with the strict rule of arriving by 7 PM. Under these conditions, she is summoned by a man named Oki to meet at a hotel. Curious about why she chose such work, Oki asks her, and Nao replies, "I wanted to be free." Drawn in by her words, he makes his move, and slowly, she begins to undress. Their encounter marks the beginning of something new.