Summer is in full swing. Shizuko was excited when her husband invited her family to go to the beach on the day she returned from a business trip. However, there is one problem... It is that my son Masaki is a "Kanazuchi" who can't even put his face in the water. So Shizuko decides to change into a new swimsuit and train with Masaki... However, he was unable to overcome his fear of water. There, Shizuko consults Masaki's childhood friend Kunihiko, who is a member of the swimming club.
