Skill Creation in the Fantasy World - Chapter 9: Fight.

The journey to the martial peak is a lonely, solitary and long one. In the face of adversity, you must survive and remain unyielding. Only then can you break through and continue on your journey to become the strongest. High Heaven Pavilion tests its disciples in the harshest ways to prepare them for this journey. One day the lowly sweeper Kai Yang managed to obtain a black book, setting him on the road to the peak of the martials world.

- Description from novelupdates

This legend tells the tale of the protagonist, Kuroki summoned to protect the demon king from the hero.

Kuroki, unbeknownst to him, suddenly came to another world. He was summoned by the demon king, Modes. The territory which the demon king overrules was in the midst of being destroyed because of the hero. He had no choice but to bow before Kuroki.

“Please save us, Savior Dono!”

Kuroki nodded, deciding to save the demon king due to an unexpected turn of event.

“VILLIAN!? Is that what you call me? Do you know what I have been through?

FATE dealt me this hand, and I'll find peace in it. Even if I have to end the world, I'll sit a king on its ruins.

I'm not a good guy. I won't even pretend that I am. But then again, who in this world can truly claim that title?

At least I know my heart. What about yours?”

.....

Chiron lived an unfortunate life, but his problems only got started when he was reincarnated in his dangerous Hit novel.

Behold, a lesson to all authors... MC's have it difficult too.

At the peak of her power, she had transmigrated to Beast World in primitive times. Drugged with an aphrodisiac, she found herself besieged by many beastmen. When Tang Guo was rescued by her reluctant fiance, she pounced on him under the influence of the aphrodisiac.

After the act, Tang Guo said, “From now on, we’ll go our separate ways. Let’s just drop the matter of us being engaged!”

Bai Ye was first angry, then dumbfounded, before getting indignant! Was this female despising him now?! He gradually realized that his arrogant, willful, unreasonable, lazy, and selfish fiancée seemed to have changed. She had awakened the Star of Wisdom and paved traiblazed many inventions. Moreover, her cooking was superb and had completely captured his heart!

The new Tang Guo was bold, decisive, and valiant, but no longer cared about him anymore. That wouldn’t do!

Bai Ye took the initiative. “Tang Guo, have you forgotten that we’re engaged?”

Tang Guo retorted, “This doesn’t count. It’s just my father’s one-sided verbal agreement. It’s fine not to mention it!”

Bai Ye forced his arms around her waist and smiled proudly. “That won’t do. Little brats can’t be born without a father!”

This was a story of a legend who loved beauty and food and led the Beast World to civilization.