I Got A Cheat Ability In A Different World, And Become Extraordinary Even In The Real World (LN) - Chapter 5Book 1: : Part 3

When you wake up, you suddenly find yourself naked, locked in an iron cage, and next to you a pair of eyes are closely staring at you, where will you cover up first? Up top or down below? Luo Qingyu didn’t cover up, she smiled charmingly, and knocked him out. Crossing? It doesn’t matter, she is a top agent, in a different era she can still mix in the wind and water. Unspoiled daughter? Oh, she’ll let the old man regret until his intestines are black…….

- Description from Novelupdates

Ludwig Heart, the heir to a vast fortune and a life of luxury, craves only one thing: freedom from his gilded cage. But when a plane crash catapults him into a world of magic and danger, he awakens not as the hero he dreamed of, but as a victim in a twisted ritual. Trapped between the ambitions of dark necromancers and the wrath of vengeful gods, Ludwig must navigate a deadly new reality where his life is no longer his own. Stripped of privilege and resurrected as an undead pawn, Ludwig’s fight for survival will determine whether he reclaims his destiny—or becomes a mere footnote in a world of shadows and deceit.

There’s SIS in great Britain, CIA in the US. In Huaxia, there’s Dragon Division, known as the mysterious power of the East.

A little ruffian who fought recklessly without any morals and bottomline accidentally time-traveled to parallel space and became a Key Case Investigation Team agent. The huge change in identity had him creating chaos in the police station. However, a strange miracle system helped him repeatedly solve mysterious cases, turning him into an impudent ruffian detective!