MTL - Mr. Rong’s Lovelorn Diary - Chapter 52

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

When Kim Seojin opened his eyes, he found himself three hundred years in the future.In the last three hundred years, humanity went through a lot of changes. Science had developed, cities became more modern, and space travel became a reality. But all of that came at a cost.The world had become a plaything of gods. Every year, humans were selected to represent their race in a devilish game, all for the entertainment of the gods.Kim Seojin was one of the thousand people selected in a timeline where he didn't belong.There was one more person. A Regressor burdened with the memories of countless failed timelines and the knowledge of the destruction to come, was also a part of the game…

Luke is a half-beast who grew up in the twisty streets of a large city called Oukiwa. Abandoned by his parents as a child, he soon had to learn the arts of thievery to survive.

Even on the fringes of a super-powered society, he has followed a single rule all his life: never get involved with the Adventurers.

However, this rule is broken when his gang begins to hatch a plan to rob the most powerful family in town.

And so begins the chronicles of Luke Lange, a thief with no ancestors who in the future becomes one of the strongest men in history, with powers that are rivaling even the gods.

Three years ago, a spatial rift appeared in the Blue Star, and Alien Beasts invaded, causing the resurgence of spiritual energy.A very small number of humans awakened their Alien Abilities. The Hua country mistakenly believed that people with stronger physical qualities were more likely to awaken Alien Abilities.Therefore, under the pressure of the Alien Beast crisis, they included physical education in the college entrance examination.As a physical education teacher, what should Chu Yi do? Isn’t it reasonable for a physical education teacher like me to teach cultivation and physical training?“Biotics Man? Aren’t they just a group of people with spiritual roots and bodies? Nourished by spiritual energy, they have awakened a bit of cultivation…”