MTL - Yu-Gi-Oh!: Underworld Boss, Cancerous Creator God - Chapter 2

The name of the War God must not be insulted!The nation's interests must not be violated! My friends and family must not be bullied! The invincible War God Ye Feng returns to the city and marries into a wealthy family. When the War God is angered, blood will dye the land for miles!“Unworthy? Wrong! With absolute power, I will crush everything in my path!”

Eight years of climbing the Tower taught Dante one thing: trust gets you killed.He learned that lesson when his best friend sold his entire party to the enemy. Now he's back at the beginning with eight years of future knowledge, a dead sister who's suddenly alive, and a front-row seat to watch his future betrayer charm everyone around him.The smart move would be to kill Adrian now, but Dante has a better idea.He's going to smile, play along, and take everything Adrian wants for himself, the power, the connections, the allies and before putting a knife through his empty heart.Revenge is a long game. Good thing Dante already knows how it ends.

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.