A New World, an immersive game experience - Chapter 1: Prologue: A New World is Release

In a world where black holes, magical talents, and formidable hunters form the fabric of everyday life, Ethan Cross—a freshly graduated student with an uncertain future—once believed he would lead an ordinary existence like everyone else. However, everything changed when he awakened a seemingly feeble and inexplicable ability known as “Coexistence with Darkness.” No one took his talent seriously—until a catastrophic dimensional rupture unleashed terrifying creatures known as the “Demons of Corruption” upon him.On the brink of death, the pendant he had inherited from his father suddenly activated, summoning three dragon girls—beings of unimaginable power, yet with complex and rebellious personalities. Cursed in the past and trapped within that pendant, these three dragons have now become inexplicably bonded to Ethan. The twist, however, is that they neither recognize him as their master nor believe he is worthy of such a union.Now, Ethan must unravel the mystery of the darkness within him, learn to control his burgeoning powers, and find a way to tame these proud dragonesses—forces that could either aid him in his quest to conquer the underworld or lead to his ultimate downfall.A power that no one had believed in has become the key to mastering the shadows. Can Ethan harness it without being consumed by the darkness?

The story is about a a hitman, Who dies because of his own recklessness and transmigrates into a game he used to play after his retirement as a hitman.I'm not gonna spoil any further, but i might answer few of your questions.Is MC overpowered?Nope, he'll become strong over time and all battle he'll fight will be because of his effort and techniques.Is there magic and adventure?Yes! It have both magic like normal isekai with adventure and fighting with monsters and many other things. There are other important things like “Essence Stone” But let's talk about it in the chapters.There will be harem?Not really, He will be in contact with many beautiful female and males but one waifu but i haven't decided yet.All i can say is, give it a try, I'll try my best to make it worth your time.

In the current era, people are either normal or are with ‘special abilities’. Cases related to the latter are managed by the “National Anomaly Prevention and Control and Special Species Management Office”.
Qi Zheng Emperor Sheng Lingyuan was reawakened a thousand years later after he jumped off the fiery Red Lake. Xuan Ji, a newly transferred staff to the Reparations Division of the Deviant Control Office, finds himself having to clean up the mess of a revived tyrannical monarch. The two seemed to share something from the past, but unbeknownst to them, a big conspiracy is stirring right underneath their noses that could destroy the balance of the world.

- Description from Novelupdates

[You have entered the dungeon at Gwachun Station’s 1st Exit.] When former high school student Kang Woojin finds himself returned back to Earth after being forcibly summoned to a foreign planet for 20 years, he soon finds that Earth is not the same, normal place as he once remembered it to be.