Nao Nishioka(43 years old) has been married for 21 years. Since her husband's affair was discovered more than 10 years ago, their relationship has been cold, but she has fulfilled her responsibilities as a mother until her son became an adult. Before she knew it, she was already in her mid-40s... She works as an office worker on weekdays, but has suppressed her feminine self. As soon as such a married woman becomes honest about her sexual desires, she instantly transforms into a lustful woman and goes wild.