The souls of the Hakkenshi are reincarnated in the present! Inuzuka Shino is a high school student who shares the name of the legendary Hakkenshi, "Devotion". The name has caused him nothing but stress all his life. Now, because of his name, he's gotten himself wrapped up in a conflict with the Blight, creatures from a giant hole that has suddenly emerged in the city.

Gaku loves to run more than anyone he knows, and because of that he always strove to be as fast as he could possibly be. He keeps on running as earnestly as always despite the fact that most students make fun of the running method he uses to compensate for his short stature. As the pain and humiliation starts to wane his motivation, he promises to himself that the next event will be his last.