My Ten Wives and Ten Rings in the Apocalypse - Chapter 7 Innate Weapon - Soul Weapon

No one knows when the first Clough door appeared. All people know is that a new era began when it was pushed open.Fortresses, sublimators, pillars of star essence, three-dimensional armaments, infinite energy, who can escape the sweeping tide of the times?In the abyss, the reverse realm, the skins, the alien gods, the mad king, the rulers, and the dark creatures, all howl in madness!Inside the black mist, the demons and ghosts crawl forward as a cross-dimensional migration silently brews.

Zhuang Shuqing, who is dedicated to her career, throws two hundred yuan bills: “We are all adults, mutual consent is very normal.”After marriage -“Boss, Mrs. Lu has taken out your will to read again.”“Hmm, I have good writing skills, let the children learn more.”“Boss, Mrs. Lu said she has too many enemies and has written a will... to ask you to take a look...”“Who dares to touch my woman?”The little princess ran over, panting, “Daddy, brother took mommy and ran away!”Guard against everything, but it's hard to guard against family thieves. A certain man's handsome face turned completely black, “Someone, send the young master to a deserted island for me!”

Lingyun, a fierce and savage cultivation genius takes over a dead teenager’s body. Coincidentally, they are both named Lingyun. Set in a alternate version of the 21st century, teenager Lingyun has been killed by someone with a grudge.

- 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.