Black Domain

An unknown presence descended, destroying human civilization and order.

Countless monsters could not be wiped out.

Humanity was forced to retreat.

Then a miracle appeared.

Humans discovered a strange world underground, made up of countless cave-like realms.

These underground realms were vast in number and enormous in size, and they were all interconnected. Their combined area even surpassed the total surface area of Earth.

They were home to a wide variety of creatures and abundant resources.

Humans found countless resources there, finally managing to hold back the monsters and rebuild civilization and order underground.

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.