Why Are You Becoming a Villain Again? - Chapter 3: Midnight Twins

In a fantasy world where everything depends on level, only ostracization and pain awaits a man that is unable to level, even if he was of noble birth.

But what happens he discovers an alternative source of experience…

John, who had been framed and wrongly imprisoned, was finally released. His five-year jail time had fostered his hatred toward the son of the Waters Conglomerate, Niel. However, John, who had no connections, could not do anything about it. When he had almost lost all hope while accompanying his girlfriend who was in a vegetative state thanks to Niel, he suddenly realized that there was a search bar right before his eyes! This search bar was just like the search bar in Google Chrome!

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

When an S-class elite assassin-raised captain of a special ops suicide squad comes home from a high-stakes Africa mission, he finds himself offered something that could potentially set him up for life- a curious assignment that he could use to finally exit his days of war and slaughter.