41-year-old housewife Sayaka Kyoda lives in Oita Prefecture, Kyushu. Her husband is the CEO of an IT-related company. Though small, he started the business while she was pregnant, leading to their marriage and family life. He works hard to support the family, and Sayaka has lived each day devoted to her role as wife and mother. However, after 12 years of waiting for her husband to return home late every night, their sexless marriage has now entered its third year. In this situation, Sayaka opens up honestly about her feelings. With over 50 past partners, she admits she truly enjoys sex. Tired of daily arguments and the state of her marriage, she now wants to focus on her own body. Seeking new excitement, she embarks on a journey of self-discovery.