In Different World with Naruto System (WN) - Chapter 336: Formulating Plan

Legend says, that there is a great demon, who is the human kind’s public enemy. He is the galaxy federations’ nightmare as he wanted to conquer the whole universe. On the first day, he completely took out the human fleet, plunging them into disorder. On the second day, he declared that he will wipe out the whole federation. On the third day, he declared——that the hero who shot him in their previous battle must marry him, or else, he will destroy everything.

The galaxy federation president and the council members had a long meeting after that. They decided to dispatch a soldier, Wu Xing Yun, and marries him off to the arrogant demon. Wu Xing Yun was once a hero who fought for the nebula, and henceforth, he was tasked—— for the sake human race and the universe’s peace, to eliminate mistresses, settle his matters with the mother-in-law, and fix the man’s crooked ways.

Wu Xing Yun was very perplexed when he asked his commanding officer: “Sir, why did it have to be this way?”

Commanding Officer: “Soldier, bear in mind, that this mission of yours, is for the sake of the universe and mankind’s happiness. You must hold on to your husband, and fight other mistresses! Do you have the confidence to accomplish this task?”

Wu Xing Yun, stood straight, saluted, and instinctively replied: “Sir, yes sir! I will accomplish this task!”

- Description from Novelupdates

【Nonsense】【No morals】【No routine】

…

The majestic world, nine heavens and ten earths.

In a colorful world, happy cultivating immortals.

When Chu Liang opened his eyes, he found that he had become a disciple of the Shushan School, and he was carrying a strange pagoda… Since then, he has embarked on an unimaginable road.

The thirty-sixth peak rises in the morning smoke, and the dragon is returned eight thousand miles away!

…

“My lord, please kill the demon!”

- Description from novelbuddy

Mortal cultivation, resurgence.

Time and space shuttle, reversal of reincarnation.
Jinxian Taiyi, Da Luo Daozu.
Three thousand avenues, the law of supreme.

“Faculty of Immortal Immortal” is a fairy tale, a story of Han Lizhen’s fairyland, a legend of a mortal kid who cultivates immortals.

- Description from Ptwxz translation

The protagonist, a renowned gamer/YouTuber aka [TorchDancer] is a master of the game “Tril Trilo Trilogy.” When offered a chance to playtest the prequel, “Part 0,” he jumps at the opportunity. But a twist of fate plunges him into the game itself, transforming him into the series’ ultimate villain, Frank Wonderstein. Trapped in a monstrous body, he must navigate a dangerous world, unraveling the secrets of the game and his own destiny. Can a hero become a villain? Or can a villain find redemption? Well, you’ll just have to read to find out.