The best mistress swamp Yua Mikami has an ideal relationship only for sex that does not interfere with work or home.

The movie explores the ideal relationship between Yua Mikami and her client, Matsuzawa, which is solely based on sex without interfering with their personal or professional lives. As they navigate their encounters, they develop a strong physical connection, but their relationship remains casual and transactional. The story delves into the complexities of their arrangement, highlighting the boundaries and expectations that come with such a dynamic.