I Became a God in a Horror Game - Chapter 85.3: Love Welfare Institute

In the year 241 of the 6th era, Constantinople was in turmoil.Emperor Constantine personally lead his army, which was completely annihilated. The pagan empire, riding on the wave of a great victory, annexed the entire eastern territory of the empire, and its military might pointed directly at the capital.The 17-year-old imperial princess Theodora ascended the throne in crisis, facing what was already a terribly damaged realm.Rome was about to fall.....................The wheels of fate spun wildly as a transmigrator appeared on the streets of Constantinople.“According to the original plot, it was only a matter of time before Constantinople would fall.” he pondered.“Perhaps I should first whisk away the empress.”(The book is categorized under game fantasy worlds, set in a magically altered Middle Ages, and another title is 'I Really Can't Lead This Team')

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

This is a world filled with mysteries from a conspiracy that has lasted tens of thousands of years;
This is a story about an ordinary cultivator’s passion and perseverance in his cultivation path;

The rise of a sect foreshadows tactics and trickeries;
The confrontation between two races reveals alliances and betrayals;

Countless deaths and secrets were buried in a catastrophe. As the secrets were slowly exposed, so too unfolded the mysteries of this world.

Let’s follow Lu Ping, an ordinary cultivator of Zhen Ling Sect, as he makes his name known in this world, forges his own legacy, and unveils the secrets of the unknown past!