MTL - Immortal Formula - Chapter 16 peaceful life

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

(Warning: Mature Content - R-18)The Ultimate Heartbreaker Reincarnates, Only to Find Himself a Pathetic Pushover?In his past life, he had gone out of his way to win their affection, humbling himself to the point of self - annihilation. But how did they repay him?His first love abandoned him for a wealthy heir, mocking him as delusional and naive.His childhood friend despised his devotion, pretending not to recognize him when they crossed paths.And the queen bee of the school? She sneered at him, refusing to even glance in his direction.But now, the man has been reborn—cold, detached, and effortlessly commanding both power and allure. Women fall under his spell without hesitation.Until one day—His first love appeared before him in a slinky strapless dress, her eyes shimmering with tears, her voice trembling: “Please… give me another chance, Master. I’ll do anything you ask…”His childhood friend was pinned against the door, her breath uneven, her gaze filled with desperate longing: “Master, even if it’s just as your secret lover—I’d be willing…”The once - arrogant queen bee shed her coat, leaning close to whisper in his ear, her breath warm and shaky: “Master… please, let me make it up to you…”He let out a low chuckle, his long fingers trailing over their heated cheeks, his eyes glinting with mockery and disdain. “You want me now?” he murmured, his tone icy. “Too bad. You’re too late.”

Being in the World of Arknights...Thing's are going to change drastically and...You best be ready for what's to come ahead.

After dying from betrayal, Thomas reincarnates as Jolthar Kaelzhar, the neglected son of a powerful clan, just after his brothers kill him. With Jolthar's memories and the blessing of Qalena, Thomas vows to rise from his lowly position and claim power in his new life.