Natsuko Kayama, as Madonna, gets sunburned at the beach! Natsuko, a single mother raising her middle school son Ryo alone, one day wins a 'hot spring trip' in a neighborhood lottery. A few days later, Natsuko returns from her trip with a surprisingly deep tan! Unable to shake off her vacation mood, Natsuko changes into a bikini in front of her son. The brown skin and voluptuous body are incredibly lewd, causing Ryo to flee to the bathroom. However, his mother, who pursues him, shows him something even more daring!
