Naruto: Kurotsuchi Mayuri - Chapter 349 - 246 : Suppressing Nine-Tails!!

In the past, the giants of the heavens and the gods were destroyed after the reincarnation of the world! Cruel curse, eternal hatred, Tan Yun is determined to never sink again! For the sake of loved ones and relatives, from now on, step on the corpse of the enemy step by step to surpass the peak! Defying the sky, killing all worlds, I am the only one!

- Description from novelbuddy

220 years ago, in the legendary Dragon Demon War, Hero Azell ended the war by killing the evil Dragon Demon race’s King Atein. He was able to save the population, but as a consequence, he was cursed. While he was dying, the high magician suggested a gamble that might save his life.

A top-secret experimental explosion transports Xiao Ming to a parallel world resembling ancient times.In this hostile land, he is the most unfavored prince, given the most barren fiefdom.Fortunately, however, a mysterious item from the experiment—the Technology Crystal—comes with him, granting him the ability to upgrade a technology tree.Thus, he begins a leisurely life in his fief, farming and developing industry.In the face of his unfriendly brothers and sisters, he has always followed the motto- friends come and get wine, jackals come and get shotguns.

[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