After Betrayal: Lightning Marriage to Mr. Enigmatic - Chapter 21: This is my girlfriend, Isabella Weaver

A series of nine stars occurred here, and various creatures violently mutated, killing the former overlords – humans crazily.

Thermal weapons are no longer humanity’s trump card.

Fortunately, mutations have also occurred in humans.

Human beings will awaken their bloodline at a specific time and gain the inherited power of various ferocious beasts.

And Xu Mo, who obtained the system, was even more outrageous.

He awakened the bloodline of the ten ancient beasts and led mankind to regain its dominance! !

- Description from novelbuddy

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.

One day, Katsuragi Daichi and his classmates found themselves in a different world. The god who summoned them to another world divided its power and gave it to them, saying that it wanted Daichi and the rest to defeat the Demon King as heroes. However, Daichi alone was given no abilities. And sure enough, Daichi was thrown away and used as a decoy in a demon’s den. Eaten by a demon, Daichi had lost consciousness and thought he had passed away, though when he came to he noticed his statuses had skyrocketed. He had obtained『Revenge of the Resented』. Every time he died, his abnormal ability powered up.

Cole is a novel author.

He enjoys writing novels and even reading other's works as well.

But that's just it.

Reading and writing novels.

Those are the only things Cole enjoyed in his whole life.

And as the time goes by, even doing those are becoming boring for him.

But then one day, Cole recieved a mail!

The mail said that his work has been chosen!

In a contest? No.

Cole's novel was chosen by a Higher Being to make it a reality!

“What kind of bullshit is this?”

“Whoever sent this must have few loose screws in their head.”

Though, Cole didn't took the mail seriously.

“Huh?”

That is until he was sent in to his own novel!

Cole became Raven Obadiah of his novel!

Who is Raven Obadiah?

No Idea! He's just an Extra in the novel!

...Or is he really just an Extra?