Anime Crossover : Living in the Heart of Tokyo - Chapter 21 Collective Amnesia, Is That It?

“You mean that Prince Yu wants to marry me?”

“Exactly, young master, Prince Yu wants to marry you!”

“Hell no! Is he out of his mind? Even if woman is a rare species nowadays, as the prince, he could have a chance to marry one. Is it because he got excluded, or maybe he has sexual impotence, so he could only marry a man?”

“No, Prince Yu is charming, majestic, endowed with civil and martial virtues, and also in perfect health.”

“Then why would he marry me?”

“Maybe because of your reputation out there.”

“Reputation? Am I quite famous?”

“Of course. Young master, you’re far-famed.”

“Really? What did they say about me?”

“They said you are ugly, good-for-nothing, short-lived, a freak, with no morals, and shameless…”

…

- 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.

The aliens came with hostility.
Facing the invasion of aliens, human beings are weak like ants.
So this is the end, the real end.
But there is resistance when there is an invasion.
For some, this is not the end, it is war.
So this is war.
Real war!

- Description from Qidian

What will you do when the gods turn Earth into their playground? Run, hide, and hope for the best? What if it isn’t an option? What if you’re the thing they want to play with? What if they want you to play for their entertainment?That is what the humans had to go through when the gods forced an awakening upon them. Pick classes, slay monsters, and survive being the god’s pet. Surviving an apocalypse can be fun, but a divine apocalypse? It will be fun… but only for the gods. For the rest, it is a test for survival.Maybe not for everyone. What if someone views it as an opportunity to take revenge on everyone who had betrayed him? What if someone doesn’t care about being used by the gods as long as he can use them for his revenge?That’s what Kang YuWon sets out to achieve once calamity strikes. Revenge on everyone, including his family, and even the gods, if they ever cross paths.