As Satsuki's brother Keiichirou trains for a race at the school's Sports Festival, he is pushed by a mysterious runner getting better.  Later, Satsuki discovers that the mysterious kid is in reality Datto, the running spirit.  Datto plans to cut off Keiichirou's feet in the race.  Can Satsuki get out of the trap set by Datto in time to save Keiichirou?