Realms In The Firmament - Chapter 25 – The Blue Gelid Qi

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

Traveling through the world of pirates, Shane fell from the sky and knocked out Shiki, the golden lion who was patrolling the floating island.

With a dazed expression, the large beasts on the island heard the sound and opened their bloody mouths one by one.

Fortunately, the system was awakened, and at the beginning of the game, he obtained the full-level overlord and domineering.

Xia En was full of firepower, stunned millions of beasts, awakened the golden lion, and vowed to accept Xia En as a disciple.

Since then, this sea has completely fallen into rampage because of his appearance.

“The indescribable monster born under the Golden Lion Gate appeared in the sea!”

“The evil generation Shane established an evil pirate group.”

“The despicable and shameless pirate Shane begins his bloody journey.”

“The emperor-like Shane led his kings across the great route.”

“The great Lord Shane has arrived at his faithful holy place, Mary Joa.”

“His Majesty Shane, the unparalleled nobility, delivered a fatal blow to the dictator of the World Government.”

…

On the Red Earth Continent Pan Ancient City, Xia En stepped on the Void Throne and looked down at many sea powerhouses.

“I come, I see, I conquer!”

- Description from novelbuddy

The MC (Minato) is a college student who died in a plane crash and was reincarnated in a fantasy world. He was raised alone in the wilderness by his succubus mother, and now he tries to make his way as an adventurer.

so, reincarnation huh?“a lot of good... a lot of bad... balanced karma.” “good news you get one boon to bring with you to the next life. unfortunately for you though, you don't get to choose. totally random. ready?”join Apollo in his new life where through sheer luck (good or bad?) is raised by an all hungry, all dominant and all loving hivemind who will burn the galaxy just to see him smile.