Nozomi Kaminashi is accepted into Setouchi Keijo Training School, a school for girls who wish to become Keijo athletes.
After getting settled in, Nozomi and the others learn that the daily routines and workouts of a Keijo trainee are far from easy.
During her first class, Nozomi unknowingly uses a powerful Keijo technique known as the Vacuum Butt Cannon. When the members of the elite class hear, they invite her to train with them.
The class-change race between the normal class and Elite Class begins; everyone is excited at the prospect of getting a better ranking in the Elite Class when they make their debut.
It's Nozomi's turn to show her skills in the last battle of the class-change race, facing off against Fujisaki Kotone from the Elite Class.
The four girls from room 309 head off to Kyoto for intensive training under professional athletes following their promotion to the elite class.
Lynn
Nozomi Kaminashi
Mao Ichimichi
Sayaka Miyata
Kaede Hondo
Kazane Aoba
Saori Ōnishi
Non Toyoguchi
Rena Maeda
Hanabi Kawai
