The story kicks off with the Demon King running away in the face of the enemy! The 6th Demon King, Ilvizora, was supposed to be quietly waiting for the final showdown with the Hero. That was how it should have gone, but the Demon King panicked and ran! The Demon King who fled from the Hero then encountered a young girl who has never know freedom. As the Demon King makes his way along a long sprawling labyrinth-like journey, the yearnings and ideals that stir his otherwise unremarkable heart quietly begin to change the world the two of them share. A life-or-death game of tag between a cowardly Demon King and the strongest Hero begins now!!