In This Life, The Greatest Star In The Universe - Chapter 343:

Su Xiao is a cold-blooded young adult who’s seeking vengeance for the death of his family, yet things ended up badly for him.

As he was taking his last breaths, he heard a voice calling him from dimensions, it was a strange system reaching him, asking him if he wanted to be saved, to be Reincarnated.

He just needed to accept a contract, Su Xiao didn’t have any choice but to do so, but he didn’t know what he signed up for!!

Travelling through worlds, doing extremely dangerous missions, collecting special items, levelling up, and even killing Protagonists…

But Su Xiao wasn’t any ordinary Contractor, Su Xiao was a Hunter!

The MC crosses over to: One Piece, Tokyo Ghoul, Naruto, Fullmetal Alchemist, Attack on Titans… and Author’s Original Worlds…

This is a world shrouded in darkness, and the pervasive black mist erodes all living beings.

Only fire can dispel the darkness and protect mankind.

But the firewood will eventually run out, the fire will eventually go out, and humanity will eventually perish.

until Rhodes came.

- Description from novelbuddy

Being abandoned by his very own blood, the world stripped him of everything, his glory, his weapon, his beloved and even his name was taken away. He tried to reclaim what were rightfully his but the people already treated him as an outcast.With nothing left to do, he strode towards the place of no return and as he reached the deepest part by accident, he found a sealed casket with an unusual question engraved on its lid.'If the world's destruction would be put in the palm of your hand, how would it end?'Thousands of choices, hundreds of possibilities, and tens of answers, yet just one of these was certain.“I'll carve it with my enemies' blood,” he uttered underneath the moonless sky.On his hand was a blade made of glass, dripping with a crimson, sticky substance. In an era where war was an everyday occurrence and death was nothing but a mere consequence of being weak, his journey towards the labyrinth of revenge had begun.- - - - -Read at least six chapters and please be prepared to crave the rest. Enjoy Reading!

[Gunfight + case-solving reasoning + decisive killing]

“I’ve been black and white, and you said I was an undercover agent???”

When Dean woke up, he opened his eyes and saw the scene where the robbers were sharing the spoils.

Because of the confusion of the original owner’s memory, Dean mistakenly thought that he was a real robber, so he chose to eat black and white, and emptied the magazine with an American-style Juhe.

Just when he was about to take the money and leave.

A blond beauty came to the door: “Dean is an intern police officer. The bank in the town was robbed. I ordered you to investigate the suspect. You don’t want to fail your internship, do you?”

It turns out that I am an undercover agent!

Dean is numb…

- Description from novelbuddy