Summer vacation is almost over and Lil'Pri is discussing about the homework that Mr. Atsui issued. When they were told to create "hot and intense memories", their classmate, Momoka Hoshino, is having trouble creating one. So, the girls decide to watch a popular kids's show called "Tobiuo Man" at Ringo's house. While they are watching the show, the girls fall asleep halfway and find out that they are on Tobiuo Planet.