A mysterious island where any wish can be granted by conquering seven dungeons. Many adventurers compete on this island, among them a boy who, due to certain circumstances, is a level 1 baggage carrier. With his earnest and hardworking personality and a unique ultimate skill bestowed by a goddess, he is treasured by other adventurers. But his role as a baggage carrier is only temporary. Using the ultimate skill in a way that even the goddess is surprised by, he finally breaks through the level 2 barrier and sets off on his journey to become the strongest.