Crazy Detective - Chapter 2664

You thought being reincarnated as an extra-side character was bad? Imagine being thrown into the body of a villain who is disowned by his own family and discarded by the author.

The moment I received the restructuring notice from my company, the world changed with a deafening roar, as if the sky was collapsing.[The sale of this Earth has been decided.][Restructuring of personnel will be carried out.]A life-or-death restructuring. Missions that grant special powers upon completion. If this is some miraculous prank, I’ll give it my all!“I found it. A way for us all to survive.”The meteoric rise of Lee Eunho, the restructuring target, begins now!

In the 900th millennium of humanity's journey towards the Star Sea, the unstoppable Expeditionary Army dominates the universe, and the fiery Age of Great Expansion nears its conclusion.Ancient cultivators seize mythology in pursuit of becoming sacred Buddhas; the new generation of prodigies shatter shackles, yearning to surpass limits!Yet, in a secluded corner of the vast cosmos, Qin Shi chooses to grind through countless achievements, unlocking one monument after another.Until reaching the pinnacle of evolution, the ultimate summit!

In novels with a stud there is always a Senior Martial Brother like this:

In the early stages of the novel, his innate talent is high, his cultivation is good, his appearance is handsome, and he has an intelligent, cute younger Martial Sister as a fiancée.

In the middle stages of the novel, he is caught unprepared and defeated by a young disciple (the protagonist) in the sect who’s hardly remarkable at all. From then on, he falls from his godly altar and loses his brilliance. Even his young Martial Sister leaves him for someone else.

In the late stages of the novel, he continues to turn dark, going down the Demonic Path and becoming the major villainous boss. However, the protagonist still ruthlessly defeats him and his soul is eternally sealed.

Once Qin Mo opened his eyes, he discovered that he had become this Senior Martial Brother.

- Description from Novelupdates