MTL - I Was a Top Student In Conan, But I Was Actually An Onmyoji - Chapter 1

Shao Xuan joins a friend in his expedition to a recently discovered archaeological cave. After he picks up an ordinary looking stone he is teleported to a different world and wakes up in the body of a small orphan child. The world he is in now is still in its stone age with primitive tools made of stone and the ways of the people are savage. Savage isn’t the only thing special about the people though, because they have superhuman strength, jump higher than trees and punch stones. In short, they are able to cultivate their bodies. Despite all this, it is a real struggle to survive because of the scarcity of food. Together with Caesar, his pet wolf, he tries to survive in this cruel world.

Tens of billions of people around the world come to the heavens to kill the world at the same time.

Hundreds of countries including Lighthouse Country, Dragon Country, Sakurajima Country compete!

Qin Feng awakened his supreme talent at the beginning!

SSS-level talent – endless extraction!

He can extract everything! Including extracting gods and demons!

【Successful extraction! You get space skills! 】

【Successful extraction! You get time skills! 】

[The extraction is successful! You get 100 strength attributes! 】

[The extraction is successful! You get 100 points of agility! 】

[The extraction is successful! You have obtained A-level talent! 】

[The extraction is successful! You have obtained an S-level talent! 】

[Successful extraction! You get SS-level talent! 】

Since then, Qin Feng has started the road of infinite harvesting……

- 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.