The Ruined Death Knight - Chapter 425: Reason of Creation?

Being given a chance and reincarnated is nice and all, yet why do I have to become that male friend who just watches the protagonist flirting with his harem?---World: Kaguya-sama: Love Is War - Hyouka ----

What are the heavens?

Aloof and solitary, none can measure it’s might. It is law. It is commandment. It is merciless. It is unfeeling.

Overlooking all existence, controlling the winds and clouds, stripping reward and punishment, leisurely yet capable. For these reasons, the Will of Heaven cannot be measured, the firmament cannot be approximated. Obey it and yield to it even though it may not be to one’s benefit. Oppose it and rebel against it, fortune and disaster however are hard to determine.

Heaven, imprisoning the manifold existences like a deep well, the living things of the mortal world as mud.

There existed such a very simple, very resolute frog at the bottom of the well, cautiously guarding his mind there were a few, faint rays of light, bearing the meager convictions to absolutely nibble upon swan meat. Step by step from amidst the mire of the mortal world, struggling to leave, step by step to exit the unseeable depths of the sordid, deep well.

When he opened his great mouth towards the thoughts of nipping the swan, recklessly taking the firmament and swallowing it down in one bite! 　

Chu Tian said, lacking money, demand even more money; lacking life, demand to pay with one’s life.

This is exactly Chu Tian’s determined, most simple and firm principle.　　

This principle is greater than heaven!

- 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.

Upon traversing through time, Divine Doctor Qi Yu became a foolish Princess, the kind doomed to be entombed alongside her husband. Fortunately, her medical skills were exceptional. With a unique secret technique, she fished a certain Prince out of his coffin and performed a spectacle of raising the “dead.”Everyone said that after dying once, the Qi Family's useless Second Miss seemed to have transformed into someone else. Not only did she punch pure lotuses and kick duplicitous teas, but she also possessed the Resurrection Technique and mastered all sorts of martial arts, turning the entire capital city upside down.All the civil and military officials of the court begged the Prince to divorce his wife, yet the Prince, with an expressionless face, retorted, “The one spoiled by this Prince, if you can't stand it, just suck it up.”