MTL - Extreme Knight - Chapter 581 Super S power

This story is centered around the man named Yi Ji-Hyuk, who has spent 1000 years in a Medieval Western fantasy-like world before returning back to the modern-day Earth. When he returns, he finds that his home is facing monster threats, and that humans with superpowers have appeared to protect the innocent people of Earth.

Protagonist travels between different anime worlds to right wrongs and uncover his reason for being along the way.

Logan Mercer, an orphan barely surviving on his own, awakened the Spending System as a child.But as a broke teenager struggling to even pay his rent, how could he possibly use it?Bullied by his classmates and cast aside by society, Logan’s life changed the day he was suddenly surrounded by men in black suits.“Your father has been missing for over a year. As per his will, you are to inherit all his assets,” they said.To his shock, Logan learns that he was the sole heir of the Mercer family fortune — and with it came control of major businesses, unimaginable wealth... and the constant threat of his father’s competitors.“System, redeem one billion dollars,” Logan said.[Redeeming One Billion USD...][Congratulations! Your E-rank fire affinity has evolved into SSS-rank Phoenix Flame Affinity!]Now blessed with talent and wealth, all that's left is training relentlessly, growing his core, and unlocking even more different affinities within it.Follow along as Logan uses wealth and determination to rewrite his fate and grow stronger than anyone ever imagined.

When I opened my eyes, I was inside a novel.