無人島Lv.9999　無人島開発スキルで最強の島国を作り上げてスローライフ

The third prince of the empire, Rusty, is declared “incompetent” and exiled from the Dvorzak Empire. However, as soon as the prince disappears, the empire inexplicably starts down a path of destruction due to a mysterious power. The neighboring countries and the entire world are engulfed in chaos and collapse one after another.

Rusty is transported by a “mysterious voice” to an uninhabited island, where he settles and uses his strange ability, “Uninhabited Island Development,” to level up the island. He transforms it into the strongest nation in the world. When rumors of his achievement spread, alliance requests and aid pour in from countries around the world, but it’s already too late. Rusty had already gained trusted companions, with whom he would spend a slow life.