Tunnel Rat - Chapter 13: Bad to the Bone

He Lang died by his own hands for the sake of his imperial younger brother’s ambition, whom he loved. He was offered to be reborn in exchange for giving up his past romantic feelings. Reborn without the burden of his romantic feelings, he brings with him a manual to new worlds. He wholeheartedly followed the instructions of the manual to complete the tasks, not knowing that the originally slag gong was blackening…
He pleaded to his affectionate Emperor brother to release him, he pleaded to the paranoid prisoner next door, but until the end he remained baffled.
In the end, he discovered that the full name of the manual was – “Slag Shou Cultivating Manual”
Σ (っ ° ° °;) っ!

- Description from Novelupdates

In the vast and boundless continent Cangtu, there were ancient sects governing the Ten Old Domains, unworldly immortal clans beyond the Blue Sky, and primordial demon gods dominating the dark abyss that together created a great number of brilliant stories over the long course of the history.

Chen Che traveled through the strange world of immortality with an overload plug-in.

Every time he enters the overload state, his body will experience some discomfort.

The training speed of the exercises has been improved, and the weak cough.

The speed of boxing comprehension increased, and the arm was red and swollen.

The speed of supernatural power cultivation has increased, and the headache is splitting.

…

Chen Che, who was suffering from an external illness, chose to practice in a low-key manner.

It was not until the first year of Daozong that the new emperor ascended the throne and began to rectify the dynastic order, killing traitors…

Then something unexpected happened!

What?

The father I never met turned out to be a big traitor?

It also affects me to be exterminated by the nine clans?

never mind! Stop pretending!

I see who can kill me!

- Description from novelbuddy