Even The Demon King, One Step At A Time

Manhwa

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! Source: MU