I created the myth of the Great Old Ones.

Lu Ban, who only wanted to make some movies to earn money after transmigrating to a parallel world, awakened a system that rewards him as long as he completes tasks.
Great!
Wait, looking under the bed at midnight? Playing piano music in a theater abandoned for twenty years? The painter from the art exhibition has disappeared? As Lu Ban completed these tasks, he realized that this world really might be haunted!
Something's wrong with this system.
He discovered that the system not only made him explore various forbidden areas and court death, but also filmed all his death-defying experiences and turned them into video material. Later, it even threw Lu Ban directly into an indescribable other world!
"Hey, if I edit these videos into a movie, wouldn't that be the best horror film?"
Lu Ban gradually came to understand everything.
Thus, legends about the Great Old Ones and unspeakable horrors began to circulate in the otherworld.
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This book is also known as "The Strange Descends: I'm Making a Movie in a Cryptic World," "What Did My Life-Training Team Do Wrong in an Infinite Flow World?" and "Me, the Investigator, a Master of Self-Destruction."
Keywords: Cthulhu, original infinite flow, fabricated mythology, tabletop role-playing game, silly, mental patient. This is a heartwarming and lighthearted novel.
Author-defined tags make infinite flow easy