Risou no Himo Seikatsu - Volume 2 Chapter 5

On the haunted mountain in the kingdom, they say there lived a witch.

She was born a princess. But even before her birth, the priest declared her to be cursed and demanded her death. They poisoned the mother to kill the baby before she gave birth, but the baby was born out of the dead mother—a cursed child.

Again and again, they tried to kill the baby but she miraculously survived every single attempt. Giving up, they abandoned her on the haunted mountain to die but she still survived on that barren land— A witch

‘Why won’t she die?’

Years later, the people finally had enough of the witch and decided to burn the mountain. But someone arrived to her rescue and took her with him from that burning place, because dying was not her destiny even then.

Draven Amaris.

The Black Dragon, who ruled over supernatural beings, the Devil who no one wished to cross a path with. He hated humans but this certain human girl would pull him towards her whenever she was in danger.

‘Is she really a human?’

The devil named this mysteriously tenacious girl “Ember”, a piece of glowing coal in a dying fire.

This is a tale of the man who brings death and the girl who denies it.

The main character Lei Yu does not have the ability to practice his family’s martial arts. He gets stepped on and tossed around. Due to certain reasons, he leaves the family, coincidentally gains an ability, and makes his own path to becoming an immortal.

- Description from Novelupdates

Forty years ago, demons invaded the eastern continent. Coming from another realm, they hunted the humans, and people soon began to wage war with them. Before long, there were those among the humans who inherited the demons' abilities.Demon hunters are currently the most in-demand profession. Although the chance of dying during a raid was high, the hunters were mostly popular among the common people. If you have some demon blood in your body, then the path to the Hunter's Association is open to you.Year 2066, Seoul. The territory of the former city is divided into three parts. Green Zone, Orange Zone and Red Dangerous Zone. Although mostly ordinary people and workers lived in the green zone, there was a chance for demons to get into it. That's why demon hunters patrol the whole area, sacrificing themselves for the lives of people.The main character, Lee Ki-hyun, inherited 50% demon blood and became the world's first SSS-ranked demon hunter. He will have to go through the path of a demon and learn the truth about his parents to save humanity.

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.