NBFF 120

“What… what is this?”

Oh Hyunseong’s mouth fell open.

He had expected to find something after Mertz led him into a cave, but what appeared before him far exceeded anything he had imagined.

Rumble.

A gigantic underground valley stretched out before him.

High above, rays of light streamed down from various openings in the lofty ceiling, while a deep valley filled with crystal-clear water spread out before him.

It was an environment remarkably well-suited for life to flourish despite being inside a cave, as evidenced by the dense vegetation growing everywhere.

A structure that was almost impossible to occur naturally.

Even Oh Hyunseong, who had traveled all over the world in the past, had never seen such an unreal sight.

In reality, this had originally been nothing more than a small, ordinary cave. But one day, Mertz had entered, taken a liking to the place, and personally reshaped it into…