Star Instructor, Master Baek - Chapter 40: I Wont Use Qi

Yo, Hi! I’m Frank, I made a deal with a demon to pay me some money for receiving a guest for a few days every week.
I had no idea about what I have done.
On May 1st, Conan ‘the God of Death’ came to my house. I was forced to let him in and we get involved in a criminal case.
On May 8th, Bruce Wayne ‘Batman’ came to me. I was forced to follow him to fight crime.
On May 16th, Hannibal Lecter, The Silence of the Lambs, came to my home. I can only say that I really can’t stand my guests.

- Description from Novelupdates

Ding![The Host has died!]A system message popped up in front of Nell's body after his last dying breath.Ding![Dark Evolution has been activated to absorb the death essence of the host.]And then he opened his eyes to find himself in the past right before the battle started.'Ah! Am I back to the past?'Ding![Please choose a partner to start the Dark Evolution process.][Partner Condition: Must be a living creature from the Monster category, not the Human category][Partner Gender has to be Female.]'Partner? A monster?'Nell's heart pounded in his chest, and he felt a cold sweat coming on.'A female monster?'

They call him Ghost.A name whispered in fear across warzones, black markets, and underworld circles.To the world, he's a phantom—a faceless mercenary who leaves no trace but bodies in his wake.To his enemies, he’s a death sentence.To his brothers-in-arms in Graveyard, he’s family.But to himself... he's a haunted man searching for a past stolen in gunfire and smoke.After a flawless mission deep in the Eastern Province, Ghost returns to the hidden forest base he's called home for sixteen years. Yet the victory is short-lived. His foster father, the commander delivers an unexpected order:“That was your last mission.”Now, Ghost—real name Miles Sterling—must step out of the shadows of war and into a world he’s never known. Guided only by a scarred letter, a fading memory, and the voice of a woman he hasn’t seen since the day everything was taken from him.But war forged more than his body and name.Behind the mask, behind the scars, Miles has another secret.One he’s kept hidden even from his brothers in arms.He’s not just a weapon.He’s a ghost with a fortune—a hidden empire he built in silence, across borders and black markets, forged in strategy and blood.A man of many names, and many shadows.Beneath the bullets, tattoos, and silence lies a truth buried in ashes.And Ghost is about to dig it up—one letter, one enemy, one memory at a time.

Zhang Ze travels to a parallel world, where people rely on the magic domain to fight monsters and become stronger to resist the invasion of monsters in the magic cave.

She entered the Demon Realm for her younger sister Zhang Ze, named Luo Sha, but accidentally activated the strongest SSS-level talent summoning technique!

Killing monsters can be summoned, the higher the level of summoning, the more monsters can be summoned, and they can be upgraded, it is simply against the sky!

In the Demon Realm, when other adventurers form a team of hundreds or even thousands of people to attack the boss, Zhang Ze has already led his army of summoned monsters to crush them all the way!

In reality, when countries were still worrying about dealing with high-level monsters, Zhang Ze singled out hundreds of high-level monsters, shocking the whole world!

“Who the hell is Rakshasa? Breaking the record of human beings exploring the Demon Realm all the way, it’s about to break through a hundred floors!”

“Big Xia Kingdom has Zhang Ze, and has already become the most powerful country in the world! If this person cannot be won over, he must be eliminated!”

“What? Zhang Ze single-handedly picked out ten fifth-level Demon Realm powerhouses? It’s over… Sooner or later, the Great Xia Kingdom will dominate the world!”

- Description from novelbuddy