Isekai Maou to Shoukan Shoujo Dorei Majutsu - Volume 8 Chapter 1 part4

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.

The second Ye Lulu transmigrates, she gives birth to three children on the spot.

Her grandfather was the emperor’s respected teacher, with disciples all over the world.

Her mother was well-read in poetry since childhood and was the most talented woman in the previous dynasty.

Her father started from nothing and gained the emperor’s favor, rising to Minister of Personnel.

Li Mingwei was an unrivaled noblewoman in the capital city.

A mistaken marriage let her see through worldly affairs. She fled the hustle and bustle and returned to live in her countryside residence, choosing a different kind of life.

By the side of the blue stone road, that person had stood still for a long time. He held an umbrella and reached out a hand to her.

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