Hikari, a mother of two, leads a busy life juggling housework and childcare. She's sexless with her husband and finds herself drawn to the coach of her son's soccer team... One day, she bumps into the coach after his gym session and invites him home, wanting to thank him with a home-cooked meal. However, they end up in a passionate affair. Before she knows it, she's arranged for extended daycare and they've been making love for eight straight hours!