MTL - I’m Really Not Wrong - Chapter 216 resentment

Monsters lurk in the night, but what if something else hunted them? An incident in his childhood left Velik an outcast with a racial subtype that thrives at night and unique class called [The Black Fang], which focuses on just one thing: killing monsters. He’s good at finding them, and he’s good at slaying them. For ten years, he’s been gaining levels and sharpening his skills on the thousands of monsters infesting the wild lands of the frontier. For ten years, he’s kept a lonely stretch of towns safe. Despite his efforts, this year has seen an explosion in the monster population, so much that he’s no longer capable of protecting everyone by himself. This draws the interest of another monster hunter, one that’s professionally licensed, but he seems more interested in investigating Velik than anything else. At least with him there, Velik is free to finally explore the mysteries of the deep wood, where he believes the source of all monsters resides. Every answer he finds leads to new questions, and not even Velik himself knows the truth of what happened on that fateful day. One thing’s for sure: not even the monsters are safe in the dark.

Apollo was a genius who was talented enough to achieve big things in his life, but because of a rare genetic disorder, everything came to an abrupt end.But when he thought everything was done, he again opened his eyes to another world as the baby of a noble family. Knowing that this might be his second chance, he decided to do everything he could to create a good and free life for himself.But surprisingly, this world is not simple, as there are beings with extraordinary power who can control the lives and deaths of others, giants who can crush mountains, dragons who can burn the seas, and many more. So now, to truly achieve his goals, Apollo needs to learn and adapt to this new world where life and death can be matters of thought.

After picking up a phone on the streets, Feng Yuchen was sent to the world of High School of the Dead. He, along with 100 people, have to travel through various worlds, fight and solve quests in order to survive.

Whoever dies in that world, would be teleported back to the real world without memories of what happened before and die in an accident one year later.

- Description from Novelupdates

The most feared Assassin in the world died because of vengeance.