MTL - I Cut Down the Troubled World Alone - Chapter 6 boss, i'm shopping

When the eldest prince Luo Fei reached 18 years old, the database automatically screened the genes of omegas across the entire empire for matching. The only son of a wealthy businessman, Mo Lin, had a gene match of more than 90% with the eldest prince. However, the moment he saw Mo Lin, Luo Fei learned that this omega is a sick child with paralyzed legs, hemiplegia, and severe mental illness???

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.

Even though he lived in America, Tang Cu had been deemed the “godly author” since his debut 8 years ago on a famous Chinese online novel website. However, many people did not know he had a severe social anxiety disorder which caused him to be considered “cold.” After being invited to do an interview for the company’s 10 year anniversary celebration in China, he finally gathered his courage to meet with his #1 fan, Pian Yu.

Pian Yu had been following Tang Cu’s novels for his entire career and, after noticing the lack of romance in Tang Cu’s popular novels, they wrote fanfiction for his novels to include the ‘romance’ Tang Cu left out.

However, Pian Yu turned out to be a male college student named Lu LianGuang.

- 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.