The Transmigrator’s Cultivation - Chapter 278Arc 15: Heavenly Secret Realm | : Encounter

This is a story of a man named Kim Sae-Jin, who one day, inexplicably wakes up as a Monster. Follow him and his perilous journey to get his life back as a Human, all the while growing even more versatile as a Monster in the process. This should be… complicated, somewhat.

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

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.

Xu Jinning traveled through time and entered the fictional world of the 1980s that was a mixture of several novels, and she was a fake daughter who would die of depression three years later. Knowing that this was an unchangeable world, Xu Jinning chose to live in ruins and survive as long as he could.

And the cannon fodder of these novels suddenly discovered that they could hear Xu Jinning’s heart!

[Sister, your plastic best friend will only lie to you, and will also plan to marry you to a domestic violence man, take away your college admission letter, and cause you to be miscarried and died by the domestic violence man. 】

Xu Fanghua: …I completely broke up with my best friend of more than ten years, pushed my best friend to a domestic violence man, and went to college with a college admission notice.

[Auntie, your house is going to be demolished. It is large in area and will subsidize several houses. Don’t sell it. 】

Aunt Xu: … gritted her teeth and refused to sell the house. Three months later, they moved into a new house and started living a life of collecting rent.

[You can’t raise pigs this year because there will be swine fever. If you raise pigs this year, you will lose money until you cry. 】

The director of a meat joint factory that changed to raising chickens and ducks: … all other people’s pigs died, and only the chickens, ducks and geese raised in his factory made a lot of money.

…

Xu Jinning discovered that she was just complaining, but why did the people around her change one by one and still treat her so well.

The eldest sister who hated her wanted to help her get into college. The second brother contracted a large piece of land for her. The director of the meat factory actually wanted to accept her as his goddaughter so that she could eat meat every day. What was even more shocking was that Aunt Xu actually wanted to demolish the house. Write her name on one of the houses she got and give it to her…

Unknowingly, Xu Jinning discovered that she seemed to win without doing anything!

- Description from novelbuddy