Bog Standard Isekai - Chapter 42Book 3.

On a certain day, Xu Xing suddenly received yin-yuan eyes; he could see a red string between lovers. Then he discovered that he had a tight connection to his own left hand.

Xu Xing: I TM …… will I be ‘solo’ for life? : )

The second day.

Xu Xing suspected that he had seen a pair of ‘gay’s. The left side of the boy’s body had two red strings. The one in front was tied to his hand, the one in the back was tied to the boy’s right side.

The bottom of Xu Xing’s body suddenly tightened. Trembling in fear, he turned his head — only to see his ‘local area’ connected to a red string tied into a beautiful, intimate bow that was attached to the school grass sitting behind him ~

Xu Xing: Excuse me???

- Description from Novelupdates

When the bird race wanted to flatter the king of the wolf race, he was thrown out directly by his parents. After that, he had been tossed like a toy by others from one place to another, numerous times. Finally, he ended up in front of the black wolf.

There was a rumor saying that the black wolf was the most ferocious existence in the wolf palace. And the black wolf’s favorite food was raw chicken!

He always excitedly gnawed the chicken, there was a possibility that blood could splatter everywhere!

Qiao Xi: I feel like I’m going to die.

And when Qiao Xi fell in front of the black wolf—

The black wolf had sharp fangs, fierce eyes, and a terrifying aura. The black wolf opened his mouth and approached Qiao Xi…

“Auwoo! Auwoo! Auwoo!”

Qiao Xi was frightened out of his wits and immediately fell onto the ground. He unmanageably changed into a human form. His body was shivering uncontrollably, thinking to himself that he was going to die.

However, just when the black wolf saw Qiao Xi’s human form, he unexpectedly turned silent.

After standing still for a while, he suddenly lifted his paw and touched Qiao Xi’s pretty little face, he stated calmly: “From today onward, you’re my little brother.”

Qiao Xi, whose eyes were filled with tears: “…?”
…

Later, the black wolf ascended the throne in the wolf race.

Someone saw the black wolf carrying a chicken in his arm, and couldn’t help but say with a smile, His Majesty, the Wolf King surprisingly carried a ration with him, which was really interesting.

Suddenly, the Wolf King’s face darkened. He said calmly without any smile on his face: “This is my wife.”

He also ate this small one every day, but not as a ration, because this was his little treasure.

- Description from Novelupdates

I couldn’t even clear the 2D version, now to clear the game in reality?Maybe I’ll have to live here for the rest of my life.Well, even that won’t be easy.– A player found himself in the game, Dungeon and Stone, as a savage barbarian.To keep his secret, he must become the mask – must make himself be seen as more savage, more fearless than any others – a paragon of his race in the eyes of the whole world.Back on earth, in the empty darkened room, the quiet computer again began to whir. Text began to appear on the black screen.「Synchronization complete. 」

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.