Yui Hayakawa (Yuina Kuroshima) is a 16-year-old high school student. The one area that she has talent is that she can run fast. One day, Yui Hayakawa travels through time and finds herself in the Sengoku period. To protect young lord Tadakiyo Hagi (Kentaro Ito), Yui Hayakawa runs on the battlefield.
