A Slave To My Vengeful Lover - Chapter 50 - Grindelwald..

A supreme expert in the Immortal World had died, and a strand of his soul returned to its original body on Earth. Tang Xiu discovered with amazement that ten thousand years passed in the Immortal World, yet only a single year passed on Earth.

Ruthlessly betrayed by his lover and trusted friends, Tang Xiu found that his soul went back to his previous body on Earth, and, despite he spent 10,000 years in the Immortal World, just a year has passed on Earth and many things have changed. Having an unsurpassed knowledge, Tang Xiu will protect his loved ones and go back to the Immortal World to take his revenge.

- Description from Novelupdates

When an S-class elite assassin-raised captain of a special ops suicide squad comes home from a high-stakes Africa mission, he finds himself offered something that could potentially set him up for life- a curious assignment that he could use to finally exit his days of war and slaughter.

Then placed into a high-school setting, Lin Yi is tasked by the chairman of a top-tier multi-billion company with bodyguard duty for non-other than his own daughter, a certain little Miss of said high-school.

His enemies, once ranging from drug lords, mafia bosses, political figures, and national leaders, are soon replaced with spoiled kids who happen to have rich papas and mamas, and Lin Yi finds his intense expertise and high-threat skillset misused, and very underwhelmed…

But he does get a harem cast as diverse as his old enemies, so Lin Yi decides that, for the sake of messing around with girls as an invincible entity in a down-leveled environment, leaving his bloody and death-filled war days behind is something he’d definitely want to strive for.

- Description from Novelupdates

Shen Yu was sincerely in love. For that person’s sake, Shen Yu ignored his illness-ridden body and plotted to overthrow the tyrant. It was only after Shen Yu died that he learned the truth. He was a character in a book, and the man he loved only viewed him as a stand-in for the protagonist. To pave the way for that couple’s happiness, Shen Yu lost everything.After he was reborn, the sickly Shen Yu was so done with that.As for that man, whoever wanted him could have him.Shen Yu took his half-brother’s place and became the male concubine of the tyrant. The tyrant didn’t like men anyway, and Shen Yu didn’t have much time left. Since he was going to die, he might as well go to the palace to sit around and wait for death.After entering the harem of the tyrant everyone feared, Shen Yu ate and drank without a care in the world.The tyrant, with long black hair on his shoulders and crimson eyes, didn’t hide his hostility. He grabbed Shen Yu by the neck. “You’re not afraid to die?”Shen “Just get it over with” Yu felt a little excited. “Are you going to kill me now?”Tyrant: “? ? ? ? ?”Shen Yu entered the palace expecting to die, but he waited and waited and waited. In the end, the officials petitioned to make him the empress, and the tyrant cured his deadly illness.Shen Yu: “…”Shou: jumps frantically up and down on the gong’s bottom line but never diesGong: all he can do with the shou is lower his bottom line again and again

Yuki, a high school junior, dies heroically saving a stranger and is reincarnated in a fantasy world, where he discovers an extraordinary and unrivaled power.