Mage Tank - Chapter 120: Damned if You Don’t

Xia Zhijun got the title ‘study god’ after scoring first place in the whole city. He’s the model of a good student in a teacher’s eyes: good grades, good manners, and quiet. When he wasn’t smiling, his entire body emits a cold abstinence aura. The girls only have the guts to look from afar and not get close.
Later, it was rumored throughout the entire school that even the study god would fight and hit on girls. Whoever dared to provoke his girl, he would teach you how to be a person at every minute. The night of the graduation ceremony someone saw him blocking Gu Siyi in the corner. He didn’t stop kissing even when she cried. He bit her lips and said in a raspy voice, “I’m going crazy…”
During college finals, Gu Siyi almost bursted out crying, “I’m such a failure. I won’t be able to find a good job in the future…And if I can’t find a good job, I can’t provide for myself…”
Xia Zhijun played with her pink earlobe and remarked, “I’ll take care of you.”
After they graduated, Xia Zhijun created a research company and Gu Siyi became the boss’s wife.
The commercial rocket, “Star of Siyi” was successfully launched. So everyone knew that the new technology superstar, Xia Zhijun has a wife who he spoils a lot.

- Description from Novelupdates

[Prince Regent VS Princess Chongxi, who will return with a cute baby after five years]

The regent of Tianxia Kingdom, who holds a heavy army in his hands, has power in his hands, and is not close to women, has been poisoned again, and this time he is about to die.

When everyone was worrying that the palace had no successors, a small group who looked exactly like the regent was sent to the gate of the palace.

Only then did they remember that five years ago when the Prince Regent was poisoned for the first time, the concubine daughter of the Yu family was kidnapped by her family to cheer him up.

Because of the same illness, she tried her best to detoxify him, but the day he woke up, she was persecuted by the royal family and disappeared mysteriously.

At this time, when a certain prince saw Xiao Tuanzi, his eyes darkened, “But your mother’s old love for this king is unforgettable, so you recognize your ancestors and return to your ancestors?”

Xiaotuanzi gritted his teeth and said: “No! In a few days, the little Marquis of Xichu will marry the eldest princess, who is my mother. My mother asked me to see if you are dead. Don’t die on the day she gets married. It’s bad luck. ”

As soon as the words fell, a certain tuberculosis prince lifted the quilt, scooped up the little dumpling, and strode out.

“Don’t worry, the king will not die on the day your mother gets married. After all… this king will go to snatch her.”

- 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.