Sakura Kunishima is 39 years old. She has been learning Japanese dance since she was young. When she turned 20, she pursued her father, who had been her teacher all this time, and a male teacher not much older than her, and she ended up with her current husband. They have been married for 19 years and are blessed with three children, and it seems like a happy married life... But before she knew it, the wife and husband were so busy taking care of the three children that they started to drift apart, and before she knew it, her husband, who is much older than her, had lost his libido... Then, on a whim, she had an affair with a man who called out to her on the street.