Dark Sovereign

Due to an accident, Jan arrived in another world, reborn as the son of the Demon King

In this profound and shadowy realm, he became the lord of the underground city, the heir to the demon king

However, the dangers in the darkness do not end there

Similarly, the demon race, which covets the position of the Demon King, and the monsters lurking deep underground

For the adventurers who roam in search of treasures and legends, as well as the knights who rise from the ground to fight for justice

Under the ancient oaths and banners, Jan will hold the scepter

Bringing unprecedented changes to the world from the dark depths of the earth

And Klein, this continent that has weathered countless storms, is about to open a new chapter