Infinite System Inheritor Return From The Abyss

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, 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 decided to follow his dream and joined the Beast Doctor Academy.