Keijo!!!!!!!! Season 1 Episode 3

Vacuum Butt Cannon!!!!

The students are told what fighting style suits them – infighter, outfighter or counter – and do exercises. Nagisa tells Nozomi to not use the "vacuum butt cannon" move she used during the practice match, as it, while effective, could cause serious damage to her spine. Nozomi insists, so Nagisa has her undergo a training in which she wears a special swimsuit that restricts her movements. Sayaka trains to match Rin's high-speed movements, and faces her in a keijo match during the class-change race, where students get the chance to advance to a higher class.