The world has fallen into an apocalypse, and survival means facing enemies with superhuman powers. An ordinary young man suddenly awakens the ability to reverse time and gets to live his life over again. Relying on both his strength and his wits, he fights back against these powerful foes and tries to make it through the end of the world. Above all, he hopes to save the person he loves, someone he could not protect the first time around. The result is a supernatural action thriller released as an ONA.