WOLFLESS: Accidentally Marked By The Devil's Son - Chapter 58: Books.

I met the male lead in prison.

First Gift: Dynamic Vision → Bullet Time → Inherent Time Control - Acceleration → Inherent Time Control - Time Stop…Tao Yu reincarnated into a world being devoured by the Abyss and discovered that as long as he was willing to expend enough Yuan Force, he could infinitely enhance his skills.With the help of his special gift, Tao Yu gradually realized that the world fragments within this Abyss were somewhat different, containing parts of Earth’s remains, and even legends from Earth were buried within…

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

- Description from Novelupdates

Humanity was on the brink of destruction. Muyoung, an assassin from the Forest of Death, fell to his knees. There were corpses all around him. For years, he had worked for the Forest of Death and had finally been able to eradicate them. Now, he, himself, was about to die. He closed his eyes as he felt his heart stop beating.