Soldier King's Love Story in the City - Chapter C20

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

At the age of eleven, the youth Ye Xuan's soul traveled through time to the distant Mythical Era, becoming an Undying monster emerging from the Emperor's Burial Ground, influencing one era after another. Yet behind Ye Xuan, an invisible force manipulated everything. Struggling to take control of his fate, Ye Xuan exhausted all means, but just as he was on the brink of success, he was betrayed by his disciple and wife, causing his soul to slumber for ninety thousand years.When Ye Xuan awoke, he found himself back in his own body and had become the son-in-law of the Emperor Immortal Sect, treated by others as a fool. The story begins from here.Eternal Emperor Soul, returned overnight.From then on, an emperor rose as a son-in-law, ushering in an invincible myth that dominated through the ages!Simplified version: The foolish son-in-law, soul returned, rose in one morning, invincible through all ages.Show-off version: “I am invincible; do as you please.” — Ye Xuan.Meme version: That year, my hands in my pockets, I knew no rivals.

Arthur Ventrike, a genius second-year at the prestigious Wolkan Royal Academy, hailed to be the most talented in his generation, reaches the Swordsman stage of Knight at just 15 under Grandmaster Thorne Bladesong. But envy strikes when a fifth-year student tries to poison him. Though the plot fails, Arthur is left crippled, his dreams shattered. Just when all hope seems lost, he inherits a Great Sage’s legacy and sets out to become the greatest wizard along with the blessing of an indecent goddess and save the world from an ancient evil.

Kyo Mazuru traveled to the world of Bleach and landed in the forest of Menos Grande at the beginning.Picking up a asauchi left over from Shinigami's death, and starting with a sword, he spent hundred years in the forest of Menos Grande to survive, slashing countless hollows, and his slashing skills reached the peak, until one day, he met a man who claimed to be Mr. Aizen Sōsuke!Mr. Aizen couldn't bear him to live alone in Hueco Mundo, so he invited him out of there and brought him to Soul Society!After that, Kyo Mazuru's Shinigami career began!