The Reason Why the Hero of Another World Saves the Earth

After the Night of Awakening, when the system appeared, everyone had mana in the world. However, Soo-Jung, who was barely making ends meet as a porter in a dungeon without mana, meets a child who claims to be a hero from another world. The mysterious and powerful power that the hero possesses. The first heart-pounding skill in her life that emerged after meeting the hero. Will Soo-Jung be able to achieve her desired goal with the eccentric hero who only remembers the mission to save the Earth?