Synopsis: Even the Demon King, One Step at a Time

One Step to the Devil, Mawangkkaji Han Geol-eum, This is No different from Villager A There can't be a stronger being in this world!" To become the strongest, Yuria, the sea king (or queen), came down in search of the strongest demon king. BUT looking at the mirror, a face of a kid? In exchange for legs she have lost all her powers even then, still aiming to become the strongest, the painful journey of Yuria begins!