Kiss the Black Cat - Chapter 7

The unparalleled Demon King Ye Xuan, who was able to heal the death or the living alike and holder of the medicine Holy Scripture, was betrayed and killed by his fellow Demon Kings. But he reincarnated into the body of Ye Xuan, the prodigal son of the Ye family and vowed to himself that he would return to his peak and take back everything that belonged to him!

- Description from Novelupdates

In the bustling city of Eldoria, nestled between ancient forests and towering mountains, lies the renowned Celestial Arcane Academy—a hub of magical learning and the central setting of the revered fantasy novel, “Aetheric Chronicles.”Unbeknownst to the residents of Eldoria, a young Earthling named Alex awakens in the academy, a place he recognizes all too well from the pages of his favorite novel.Gifted with an OP ability yet unable to use it properly, Alex quickly realizes that he is not merely a student but a living embodiment of a character from “Aetheric Chronicles”, an extra or a side character to be more precise.As he navigates the grand halls of the academy, he's met with a surprising twist—characters deviating from the expected plotline, unforeseen events altering the carefully crafted narrative.Eager to maintain the balance between the known world of “Aetheric Chronicles” and the unpredictable reality he finds himself in.However, the unpredictable nature of his presence in the novel's universe sparks whispers of prophecy and conspiracy among the world's inhabitants.Guided by his knowledge of the novel's lore, Alex faces dilemmas that challenge the very essence of his character. Will he follow the prescribed destiny laid out in the novel, or will he forge a new path and risk unraveling the delicate threads of the fantasy world?Will he find answers to the questions he seeks for?Will he reach the ending of the story? If there is one...

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