Stepmother: I Am Asked To Give A Kidney To My Half-Brother - Chapter 4

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.

In a world of countless schemes, where you are being manipulated at every moment,often without even knowing it.A world where you can't be sure if what you see is reality… or just another illusion crafted as part of a deeper scheme.This is the story of someone who survives it all kind of schemes both small and vast, some he understands, and others he never even realizes.Even he, who is constantly being schemed against, crafts schemes of his own against others.This is a world ruled by deception and Yuan will persevere it, shape it, and rise through it.------------English is not my native language, so please understand if there are any mistakes

The figure of the Armada seems to be still riding the wind and waves in the Atlantic Ocean, and the gold of South America still seems to flow in continuously. As Alfonso from the Bourbon family returns to the Royal Palace of Madrid where he was born, the story begins here…

- Description from novelbuddy

A human from Earth is thrust into the [Hunter x Hunter] world, becoming the Zoldyck family’s defiant, red-eyed prodigy. They call me a genius and the rightful heir, but I say that’s Killua’s burden to bear.Armed with crimson eyes, and a subtle yet powerful system, I’ll rewrite destiny, upend the world, and embrace the chaos with a wicked grin.