After several years of marriage, Mina, who lives with her husband and only son, Takashi, feels a little bored with her ordinary days.The story begins one summer day when she goes to the community pool to deliver something her son left behind and meets Yuta (a university student), a swimming coach.A few days later, Mina bumps into Yuta on the street and invites him, saying, ``Would you like to go have dinner with me?''From this day until the end of summer, Mina indulges in extramarital sex while her son goes to the public pool...When ``mother'' turns into ``woman,'' no one can stop her.
