Oak Harbor lay along a slow-flowing stretch of the Tiberius River, an important port on the great river that crossed two kingdoms and several city-states.
Also a free city-state, Oak Harbor had a loose pact with the nearby free city-states of Plas City-State, Rafael City-State, and Schuster City-State.
The pact stipulated that if a city-state suffered an attack by the Red Maple Kingdom or America Duchy without having provoked it, the others had to aid it in both offense and defense.
It was precisely because these free city-states stuck together that they all lived quite comfortably.
Originally, the four free city-states had three Hero Domain experts, of whom Levi Beck of Plas City-State was the strongest.
Oak Harbor was home to another dwarf hero, Sowen Oakwood, known as the "Iron Hand."
This dwarf hero had come from the southern Dwarf Kingdom and lived in the human world for many years. Thanks to the longer lifespan of dwarves, he was already over two hundred years old.
Not only had he left behind many heroic deeds of saving civilians, driving back Yōma, and slaying magical beasts.
He also possessed outstanding smithing skills and personal strength, and was deeply loved by Oak Harbor's residents.
Oak Harbor was also one of the few cities where humans and dwarves lived together.
It had both human nobles and dwarf lords.
Although Levi Beck of Plas City-State had previously been the strongest, Oak Harbor was actually the main pillar on which the Four-City Alliance relied.
Because no one knew whether Sowen Oakwood could bring in the dwarves to intervene.
However, Sowen Oakwood had always seemed carefree. He hardly managed this well-situated city himself and even spent much of his time hanging around taverns, keeping close to ordinary people.
When it came to administration and taxation, dwarves truly