NamhyeBlueMoon

Han Seojun was a loser, frail and barely more than skin and bones from a life of poverty, was raised by his hardworking mother with no knowledge of his father. At 18, he inherits the Ancient Infinite System, a power passed down for generations from Goddess Zyraena, The Former Echidna (Goddess of Monsters).

The system transforms his weak body and improves their lives. Just as Seojun is about to take his dream veterinary exam, he's suddenly summoned to the Abyss Realm, a brutal world where only the strong survive.

After 500 years of battle (About 69 Chapters) Seojun finally took back the Realm and returned to Earth. 

Ding!
[Congratulations Host! You have max your level! LV. 999,999]

Ding!
[You have obtained a Hidden Class: SSS-Rank Abyssal Tamer.]

[Title Acquired: Lord of the Abyss]

But the world had changed. Dungeons and monsters are rampant, and people now possess skills and classes granted by a system called global system Where Earth transformed A Game into Reality.

People granted is known as the Awakeners and Seojun, protected by his Infinite system, rejected the global system. 

With the world so different, Seojun then took a role of a professor to live peacefully but instead obtain a hidden profession. 

Ding! 

[Congratulations! You have obtained SSS-Ranked hidden profession transcendent mentor!]

First task: Select one Non-awakened student.

Infinite System Inheritor Return From The Abyss

It had been two hours since they found their first marble. They wereexhausted, their energy drained from walking , avoiding and running from the wild beast.

The siblings collapsed onto the grass, breathing heavily. Andrew sat down nearby, wiping sweat from his forehead.

"H-Hey, let's rest. We've been walking," Andrew said tiredly before lying down flat on the grass.

Lila glared at them, ready to scold, but seeing how exhausted everyone looked, she sighed. "Fine! But not for too long," she muttered, walking to a nearby tree. She sat down and leaned against the trunk, crossing her arms.

The brother groaned, still lying on the ground. "Hoo! Why can't we find any blue or red marbles? It's always the yellow ones!" he complained.

Andrew, sitting up, glanced at Seojun, who remained standing and stared off into the distance. "Seojun, sit down. You need to rest too," Andrew said.

"I can still stand," Seojun replied calmly, his tone indifferent.

Chapter 206: The 2nd Marble