Nao Yamaguchi is overwhelmed by her neighborhood association duties and steps in to assist the committee members in place of her busy husband. Among them, Okajima and the others treat her with exceptional warmth, making her feel genuinely welcomed. In gratitude, Nao decides to host a welcome party for them. However, unaccustomed to drinking, she quickly becomes intoxicated and loses clarity of mind. Seizing the opportunity, Okajima pretends to care for her, gradually undressing her under the guise of assistance before giving in to his desire and forcing himself on her. Once having tasted her, Okajima becomes increasingly drawn to Nao's kindness and grows determined to make her his own. Witnessing her predicament, other neighborhood members sympathize with her situation and try to protect her dignity. Yet, caught between responding to Okajima's advances and staying true to herself, Nao continues searching for her own path forward.