A small miracle happens to Hitomi, a mother who works hard for her single son, Kyotaro! She wins a "trip to Miyakojima, Okinawa" in a lottery at the shopping district. Two weeks later, when Kyotaro sees his mother return from the trip to Miyakojima, he is surprised at how much she has changed. She has a deep tan, and her personality and clothes have become brighter and bolder. As if to tempt the confused Kyotaro, Hitomi, who has just gotten out of the bath, takes off the bath towel and shows him her body, with the clear marks from her swimsuit still visible, saying, "Mom, I'm so hot I feel like I'm going crazy..."