Chihaya Sakurazaka's got one thing that sets her apart—her legs are as fast as the wind! When Mio Koshimizu introduced her to track and field in middle school, a whole new world opened for Chihaya. Before she and Mio went to different high schools, they swore to be rivals for life and meet again in an inter-high tournament. But when the time finally comes, something unexpected brings Chihaya's ambitions to a screeching halt...