Suterareta Yuusha no Eiyuutan - Story 3-18:『Lunch』

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

People keep assuming I’m some kind of evil mastermind.But seriously, I’m just a son-in-law freeloading off my noble wife’s family.…Why does everyone look so suspicious?Wait—don’t tell me. Is it because of my squinty eyes?!

One night of spring breeze, stirring the white window screen fluttering in the air.Only a nightstand lamp is on in the room.The light is a soft, dim yellow.......

In the aftermath of a tragic incident, the soul of Zhang Fei was transmigrated into a sacred body in a world of cultivation. Joined by the consciousness of an ancient cultivator, Zhang Fei must find a way to survive in this deadly world of beast demons and immortal cultivators.