My Dragon System - Chapter 1: A New Life

Jin-Ho Kang was just another B-rank Hunter—one of countless warriors struggling to rise in a world dominated by monsters and guild politics. When an A-rank dungeon scouting mission goes horribly wrong, he and his team are slaughtered. He should have died.But instead of death, he awakens in an abyss beyond mortal comprehension. A voice older than time itself speaks to him, a decree is made, and the truth is revealed—he is no longer human. He has inherited a power that was never meant to be his.The world forgot him.But he has returned.As a Sovereign.As the Monarch of Shadows.And as the boundaries between life and death begin to blur, the world will soon realize…The true King has awakened.

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

Ever since the appearance of the Tower of Genesis twenty years ago, children's dreams began to change. Becoming a Hunter became the most popular aspiration.The same was true for Nathan Cole. But unfortunately, the Tower had yet to summon him. The Awakening he longed for never came.Until one day, he was suddenly summoned into the Tower. He was overjoyed—but the happiness didn’t last long.Nathan had been summoned… because of a bug.

In the depths of a newborn universe, a cultivator takes advantage of the abundant energy to refine himself a treasure. But after 14 billion years of refining and quite a few more to go, he decides to entertain himself by releasing countless systems and watching how the creatures of this fledgling universe handle them.

On Earth, a young man, lost and confused about what to do with his life, sits in a park and looks up at the night sky. A shooting star, a wish and a bang. When the boy finally wakes up he hears a sound, "assimilation complete. Launching System. Welcome to the Midnight Inn. Host Designation: The Innkeeper."