The DIY club decides to go to the beach. They’ll gather materials to make little things like bracelets to sell, adding to their club funds. When Purin hears that Jobko is going to the beach, she decides to go along, unaware that it’s a DIY club activity.

The DIY club holds a celebration at their newly completed secret hideout. Then summer vacation starts and Jobko heads home, promising she’ll see everyone again. Purin takes Serufu to the DIY club, saying that the secret base is still missing something.