Saya Kogatana was a student at Setouchi Keijo Training School. She was ranked sixth in the Elite Class.

Upon graduating from Setouchi, Saya officially becomes a B-Rank Keijo player, affiliated with the Kansai's Kyoto Branch. After collecting enough points, she is able to advance to the A-Rank.

"Keijo" is a popular gambling sport where contestants stand on platforms floating on the water and must use their butts and chests to fight against each other to push each other off the platform. Nozomi Kaminashi, a high school student, aims to join the sport after she graduates. Nozomi was raised in a poor family and hopes to make lots of money by playing Keijo. She grew up training in gymnastics, and she has good balance and flexibility.<br><br>After high school, Nozomi joins a training boarding school and enters the world of Keijo.<br><br>(Source: Anime News Network)

Kaminashi Nozomi (17) is an exceptional gymnast. So much so that colleges with some of the best gymnastic programs are trying to recruit her. Unfortunately for them, she has other plans. Due to her family being extremely poor, money is everything to her. That's why she wants to step into the world of "Keijo." "Keijo" is a type of gambling sport where girls stand on a small floating platform and compete against one another. The aim is to push the other contestant off of the platform into the water, but they are only allowed to use their butt or breasts to push the others off. Will Nozomi be able to compete in the intense world of "Keijo" and bring wealth and fortune for her family?