Kyoka, a full-time housewife in her fourth year of marriage, had been living a peaceful life while waiting for her husband Yoshisuke's promotion. However, Yoshisuke's unilateral decision to prioritize delivery to a client caused problems, putting his career advancement in jeopardy. His boss Sakawa demands 'just once' from Kyoka to maintain the business relationship, which becomes the catalyst for her descent into deep carnal desires…
