Battle Athletess Daiundoukai ReSTART!

As technology advanced, humanity spread throughout the solar system, occupying facilities from Mercury to Pluto. This led to the creation of a large-scale athletic tournament called the "Daiundoukai," where female athletes from all around the solar system compete for the title of "Cosmo Beauty."

When Kanata Akehoshi was a child, she witnessed a meteor-like object falling from the sky and crashing in a nearby forest. When she investigated the wreckage, she found a damaged spaceship and a weakened girl inside. The girl gave Kanata two wristbands and asked her to join the Daiundoukai and become the Cosmo Beauty. Kanata agreed, but before she could ask the girl's name, she disappeared leaving no trace.

Kanata won the qualifying round to represent the planet Earth and went to the University Satellite, an institution where she and other candidates studied to prepare for the tournament. There, she made friends with her fellow competitors and helped them get along. As Kanata moved closer to the title of Cosmo Beauty, she also got closer to finding the girl who changed her fate and discovered a hidden mystery behind the Daiundoukai.