Owari no Chronicle - Volume 2, Chapter 27: Longing for Right and Wrong

Nameless Traveler, “If you could bring the martial arts, Inner Strength, Daoist skills, Divine Skills, and other abilities you've learned in the game into reality, would you play such a game?”Gamer, “Of course, I would play. Is there really such a great thing?”Nameless Traveler, “Then, if you were to die in the game, and you would also die in reality, would you still play?”Gamer, “Let me think about it—um, I think I would play, as long as I'm careful to avoid provoking higher-level monsters.”Nameless Traveler, “What if the game was so difficult that a Little Monster at the entrance of a village could easily chop you down, would you still play?”Gamer, “……”

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

Ethan, a high school student that died alongside his bully transmigrated into another world.Ethan awakened in a parallel world, one where supernatural talents determined your worth, and the talentless serve as expendable cannon fodder.Born talentless in this new world, Ethan finds himself assigned as cannon fodder against the monster hordes that threaten humanity.But his death in the previous world seemed to have granted him a supreme Talent.Follow the story of Ethan as he awakens the strongest talent and strives to become the world's Strongest.

Upon opening his eyes, Muyang realized that he found himself in Dragon Ball’s world filled with dangerous people like Vegeta, Frieza, Cell, Majin Buu.