He found himself in the middle of an unnamed forest. Now he has to survive!

Join Echo in his adventures of building anew civilization of fantastic creatures and exploring this magical world! He was summoned to this magical world, and started to develop his small tribe with his new friends. But, soon, it all ended with a mystical mist, leaking from behind a mysterious gate. Now reborn as a dungeon master, Echo strives to build the first kingdom of the underworld. Join him in his adventures of building the biggest dungeon and the only underground city of the world, thriving!

MC is building a dungeon kingdom in a world with RPG-like features