DxD: I know…I'm not the real one,just a cheap copy. but...I'd win - Chapter 50: Random - or Omake:

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

Su Chen traveled through the fantasy world and awakened the god-level bragging system.

Earn rewards as long as others brag about it!

Brothers and sisters of the same school: Although everyone is at the same level, but like you, my senior brother can kill ten in seconds with one sword!

Su Chen instantly stepped into the taboo realm, becoming the number one person in the same realm in all ages!

Zongmen Elder: I think Su Chen has the appearance of a great emperor!

Su Chen’s physical body became great immediately, his altar was clear, and his talent was raised to the extreme.

Supreme Immortal Emperor: From my point of view, the sword in the hands of fellow Taoist Su Chen is simple and unadorned. It looks ordinary, but in reality its brilliance is restrained. It must be a supreme weapon!

In an instant, the sword in Su Chen’s hand shone with divine brilliance, and turned into an extreme imperial weapon.

Peer Tianjiao: Are you really as strong as the legend says?

Su Chen: Wherever it is, it’s just everyone flattering and bragging.

…

The introduction is weak, please move to the text!

- Description from novelbuddy

She, the unfavoured adopted daughter of the Lin Clan, was just a pitiful little girl who had to live under someone else's roof.

And he, son of the richest man in the country, tall, handsome, and cold and evil.Originally, the two of them had not interacted at all.

However, due to a coincidence, she had become his wife.She had originally thought that she was only being used by him, but he would actually be a wife-doting man!

Whoever dared to bully her would be annihilated by him!

He was extremely overbearing outside, yet he was more like a hungry wolf in bed.

She couldn't bear it any longer and wanted to escape, but he blocked her.He lovingly asked, “Wife, you’re already pregnant with my child, where are you going to escape to?”

He was the cold-blooded prince of the Jin country. Decisive and smart, he had looked down on the world with apathy and disdain.