Runemaster in the Last Days - Chapter 3: A Separate World

Enemies to Lovers? You are at the right place!Liam Von Sylvyran: He is the third prince of the kingdom of Solaryn. He is also the youngest of all siblings. Though he is blessed with magic power, he cannot control this magic power. He has always been humiliated for this flaw and has always been compared with his older siblings. So he has a hunger to prove himself. He is the commander of the royal imperial army of Solaryn. He is one of the best fighters on the continent. It is also notable that he is incredibly intelligent, quick-witted, and has extraordinary beauty.Kian Eryx: He is the commander of Oblivara's imperial army. There is a quote that says that he is blessed by magic itself. He is one of the greatest magic wielders in the three realms. He is the definition of perfection. He has breathtakingly good looks, is incredibly smart, observant, and has extraordinary reflexes. He places top among the best fighters on the continent. There is nothing that he lacks aside from a heart.

The world is about to be destroyed to make way for an interstellar transmission array formation. A young man journeys through the stars to save his home. A bloody fantasy adventure.

- 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.

On the Great Land of China, forces clashed for the sake of supremacy and Bloodline Warriors ran amok; the conflict of the strong threatened to shatter heaven and earth. A young man named Lu Li—nothing more than a humble Coffin Carrier from the Northern Desert—came along with Lu Ling, his sister. The two were regarded as puny insects and bullied, but little did people know that Lu Li had the strongest Bloodline of them all in him.

He mounted the most handsome of horses and drank the strongest of wines;

He bedded the most beautiful of ladies and murdered the most hated of people;

He told a huge lie and carried with him an ill-reputation undeserved;

He traveled all by his lonesome and danced with devils;

He had given his word that he would come back, that he would be strong.

And it was because of this that she was still waiting in the city—alone.

- Description from Novelupdates