Takarakuji de 40-oku Atattandakedo Isekai ni Ijuu Suru - Chapter 52

Reborn as the ill-fated Third Kazekage from the original series, I am determined to rebuild Sunagakure into the strongest Hidden Sand Village through tireless effort and visionary leadership. My goal is to survive and thrive in the recurring Shinobi World Wars.I will show these ninja, who are obsessed with slaughter and conspiracy, what true 21st-century wisdom and modern governance look like.The world of ninja is not a story written solely by Konoha.

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

I am Supreme