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

Seojun moved like the wind, quick and sharp. The first man swung a blade at him, but Seojun stepped aside easily, grabbed his wrist, and twisted it. The blade fell to the ground, and with one push, the man crashed into another, knocking both down.

"Is that all you've got?" Seojun said calmly.

The next guy, holding a staff, tried to hit him. Seojun ducked, grabbed the staff, and yanked it away. He spun it once and used it to trip the attacker, sending him falling face-first into the dirt.

The last man of Moss's group sent vines shooting toward Seojun, but Seojun dodged and grabbed a vine midair. He yanked hard, pulling the man off his feet. Seojun stepped forward and delivered a swift kick, knocking the man out cold.

Chapter 214: Finders keepers