One fateful day, high school sprinter Hitomi Kanzaki experiences a disturbing vision of another world and discovers from her best friend that Amano (the track team star she has a crush on) is about to go abroad. On an impulse, she asks him the next day for her first kiss -- if she can sprint 100 meters in thirteen seconds. But then, a young warrior prince and a dragon appears before Hitomi during the run ....