Nozomi Kaminashi has successfully been admitted to Setouchi Keijo Training School, where she's reunited with Miyata Sayaka, a promising young judo star who she met during her tryouts. All students at the training school stay in dorms, where they eat and sleep together as they study. Nozomi's family is poor, so she wants to be the richest Keijo girl in Japan. Promising future star Kawai Hanabi, and her friend Mio, are both very interested in Nozomi as well. The story of the girls who want to be Keijo athletes begins!

Now that Nozomi and the others are settled in, it's time to get to work! The life of a Keijo trainee isn't an easy one: there's butt figure eights, butt squats, butt-runs, and other butt-related activities. Then, to top it off, they have to play butt hackey-sack with a beach ball!

During her first class on the Land, Nozomi unconsciously uses a powerful technique called the Vacuum Butt Cannon. When they learn that she's used this technique, Rokudou Rin, Kawai, and the other members of the elite class invite her to train with them. Nozomi is excited and vows to master the ability. But then one of the teachers calls her...

The class-change race between the normal class and Elite Class has begun. Everyone, including Nozomi, is excited. Anyone who graduates in the Elite Class can get a better ranking when they make their debut. The class-change race is broken into four groups. The first match is determined to be on the see-saw-style land, with Sayaka and Rokudou in the same group. Rokudou calls herself the fastest outfighter in Western Japan, but will Sayaka be able to beat her...

Nozomi is worn out from Shirayuki's coaching, and continues to be worried about the weakness that her coach has pointed out. She talks with the other four, and decides to watch Shirayuki more closely for hints. Nozomi gleans insight, but as a result, ends up having to pull turnips with her butt?

It's time for the second race in the East-West Tournament. They're on a Flight-Type Land, where two aircraft are connected to each other, resting on top of the water. Kazane, Tsukishita, Yoshita, and Non are all fighting for Setouchi. The four are all trying their best to combat the Suruga team, but things are looking grim. Will Non and the others figure out a way to overcome their opponents?

It's time for Nozomi's third race. Kawai, Kogatana, and Rokudou are all ready to fight. There's a special Castle land prepared, but right out of the gate, the four start having trouble. Nozomi takes on Maya, and with some careful attention, learns the secret of her butt. Will that be enough to defeat Suruga?