MTL - Douluo Dalu 4: Ultimate Fighting - Chapter 21 Ye Feng Dengmen

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

After dying, you wake up and realize you've been reincarnated as a background character who is judged as human trash.The decision to change your destiny comes instantly.Discovering that your identity isn't as simple as you thought, you feel favored by the heavens when you manage to become a powerful character.Katase: You won't fool me. I'll expose you for the pervert you are.Murayama: ...Thank you for saving us.Issei: Motohama, what happened to you? How are you so powerful?Rias: If you join my peerage, I wouldn't mind being yours.Sona: You beat me in the game. That means you're now my fiancé.Yasaka: Honey, Kuno wants a little brother.Kaori Houjou: Shinji-kun, let's go on an adventure.Kaede Kazama: Shinji-kun, thank you for saving me from that ball.Rie Sawada: Shinji-kun, I'll wait for you. You'll be my future husband, fufufufu...Changing known history and taking it in a direction not even his eyes could perceive, he didn't stop no matter what. Not even the other world was safe from his clutches.Lexia Von Arselia: My hero, and my future husband...Shinji advances without stopping.“I, Shinji Motohama, swear here and now that I will reach the top of both worlds.”

Reborn in a parallel world, Fang You landed on earth with the cry of a newborn!By achieving growth goals, he could unlock various unique talents, positioning himself to win right from the starting line!As a baby: Accomplish 1,000 rollover movements to unlock the talent “Reverse Life”;As a toddler: Master 10 paper airplane folding techniques to unlock the talent “Origami Celebrity”;As a youth: Secure 100 victories in “Three Kingdoms Kill” to unlock the talent “Rising to Prominence”;“Absolute Focus,” “Eat without Gaining Weight,” “Never Nearsighted,” “Five Seconds to Sleep,” “Photographic Memory”...With the continuous acquisition and accumulation of growth energy, more all-around talents gradually emerged...Starting as a well-known internet sensation baby cutie and accompanied by the neighborly companionship of a girl who was like a sister from another life, enjoy the sweet, loving daily life of winning from childhood to adulthood!

Xu Min realized that he was gifted with an exceptional talent for cultivation as he was training to become a family guard. His path was set before him but due to the jealousy of man, misfortune befell him. Xu Min found that he could trust no one as he began walking down the path of vengeance in a world where only the strong survived.