Code Zulu Alpha: Nerd in the Apocalypse! - Chapter 18

After saving one world from a demon god and earning the trust and admiration of a perverted goddess who wants to be his plaything, Sol's terrible luck causes him to get summoned again to another world with her almost as soon as he returns to his own.However, this time around he refuses to take on the role of a hero.Instead, he decides to challenge a pantheon of gods as a side quest while living as a simple and misunderstood man under the protection of his goddess who took his place as hero. Unfortunately, even without trying Sol can't avoid attracting trouble and is constantly getting dragged into epic battles against the gods without even trying because of his cocky personality and bad habits.But that's fine too, if the gods want to fight then he'll gladly take them on and plunder them into ruin!

Despite gifted with extraordinary talent, I resented my life being cut short.One day, fueled by alcohol, I penned a proposal letter to a princess, hoping to alter my fate.[Sure. I’d love to marry you.]…What? She’s accepting?The problem is, I proposed to all five tyrant princesses.And to make matters worse, I have no clue which one responded.

“I can’t do it anymore. Stop it…I can’t take it anymore!” The second young master stopped in his tracks and raised his brows as he stared at Miss Jiang. “All you had to do was jog, so—”

Everyone knew that Miss Jiang was an artiste who had been defamed and blacklisted before she became famous again. When she got into trouble, she did not give up but fought persistently. Everyone knew that the second young master was the mysterious head of the enterprise. He was an extremely cold person with an exquisite taste. Moreover, the second young master had recently adopted a new hobby. He took in his younger brother’s ex-fiancée and he was extremely fond of her…

- Description from Novelupdates

Li Xuan traveled through the world of immortality and opened the apprentice system, and both apprentices and apprentices could be rewarded for upgrading.

【Ding! Accepting apprentice Qin Yue, reward you: Innate Divine Power]

【Ding! Accept the apprentice Zhao Tian, ​​reward you: call the wind and call the rain]

【Ding! Apprentice upgrade, reward you: space shuttle]

….

Li Xuan, who accepted a bunch of apprentices, evolved infinitely in seclusion.

Ten years later, the Devil Emperor invaded and wanted to sacrifice the whole world, but no one could stop it. The disciples watched the world fall into despair in pain.

At this time, Li Xuan appeared and slashed a sword against the Demon Emperor under the watchful eyes of the public.

Boom!

The sky fell apart, the invincible Demon Emperor fell on the spot, and the entire dark world was swept away by a sword.

The disciples were horrified. It turned out that the strongest person in the world was actually the master who had been in seclusion for ten years.

- Description from novelbuddy