MTL - Supreme Demon - Chapter 3341 Promise!

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

Transmigrated into a cultivation world, reborn as a striking genius with extraordinary talent and a formidable lineage. But there’s a catch—he’s the villain, already pitted against the story’s invincible protagonist.So what? The hero may wield the power of fate, but this villain has a cheat system, taking every advantage with ruthless precision. Witness him defy the heavens, rewrite his destiny, and rise to unparalleled dominance!

She is the slow-witted idiot of the Prime Minister’s Residence. Everyone bullies her. He is the most respected and unfeeling Prince, with frightening ability and absolute envy! Together, they are conferred an imperial edict of marriage.

Hikaru crossed to Misty World with billions of other players. This world is full of monsters and fog.

Hikaru thought he wouldn't be able to survive in this horrible world when he suddenly possessed an SSS-class skill.

[Ding! Maximum Evolution.]

[Ding! Do you want to evolve Succubus into Fallen Angel?]

[Ding! Do you want to evolve Komodo into the Darkness Dragon King?]

[Ding! Do you want to evolve the Wooden Sword into a God Sword?]

…

Hikaru: “In this world, I am the lord.”