Maki who divorces her husband and raises her school student son, Taro, on her own. One day, Taro wins a "Trip to Okinawa" in a neighborhood association lottery, and Maki leaves for Okinawa instead of Taro, who is busy with club activities. A few days passed, and when Taro saw her mother returning, he let out a cry. He was tanned to a brownish color and had become brighter in both appearance and personality. Maki tells Taro, who is confused, to apply a moisturizing cream, saying, "My sunburn marks are itchy." She takes her unsteady son's hand and gradually brings it closer to her private area...
