Building a Business Empire with my Technological System - Chapter 303: Frigate Acquired!

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

This is an Isekai styled story, written from the point of view of the protagonist.

Discover the secret of the new, unknown world with Peter, as he sets his first steps in an empty, ruined city. Meet new people from all around the globe. Fight, laugh, and cry.

She, has always refused to let go of her childhood pride.Initially, he forced her into submission in the harshest way possible, which made her despise him to the bone.At twenty, she abandoned her husband, followed a man she thought was worthy of her, only to end up being violently mistreated.Yet, it was he who raised her from the rain when she was at her most helpless moment.Fate brought her back to her eighteenth year, for a do-over. She emerged from her cocoon, when hate was replaced by regret, she shed her thorny exterior, but does she still have the right to pursue happiness?But why does he always remind her in the coldest voice, “He Zhilan, I don't want the He Family to raise an ungrateful wretch.”Or menacingly warn her, “He Zhilan, don't force me to take away your freedom!”

Satou Shiki a Japan present-day university student suddenly one day he got attacked by a slasher when he open his eyes he was already transferred to another world’s labyrinth city. In that another world he who was awakened to do a lot of “things”.