As she approaches 50, Sanae (49) feels her sexual desires are at their peak, so she is given a gift: a hot springs trip with a sex-crazed boy. Sanae, who rarely leaves Tokorozawa, is somehow exhilarated and girlish. She eats what she likes, sightsees however she likes, and has sex whenever she likes. She forgets about being a mother, a wife, and her job, relaxes, and stretches her wings...