I'm at Level 30, But I Can Slay Level-9999 Beasts in One Hit! - Chapter 362: Appraisal Skills

When I cleared the final chapter of a game that was a national failure, I became an unnamed side character in it.

A non-standard, unmeasurable, EX rank supporting character.

If life could repeat itself, what would you do?Would you repeat your first life and stay a normal average joe? Perhaps your gaze will betray the life you’ve already lived, but you remain insignificant and unknown, stretching your neck up high to watch the furling clouds roll by?Or will you make the world your stage, stir up every cloud and wind under all the heavens, making the entire world your captive audience as you dance, making people’s hearts pound with your every move?Composing my own laws, establishing the order I desire…a human life is a measly ten decades, so why don’t I light the candle that is my life and set this world ablaze!!

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

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”.