Thousands of years ago, a mysterious demonic parasite was developed by a cult that worshipped those that walked the surface of Hell. These parasites were known as Jigo. They were small in size, but made up for it with their dangerous abilities. The Jigo possess the ability to corrupt their victims by latching on to their bodies and burrowing deep so that the victim will have no way to get them out. Once inside, the corruption cycle begins. The victim will feel an intense burst of pain, screaming out in pure agony. Then, their body will go through a hellish change. Their eyes turn bright red, their nails sharpen to the point of feeling like knives, their teeth will become sharp and jagged, and purple veins form at the side of their faces. Once the corruption is complete, the Jigo will have full control over their victim. Any trace of who that person was will disappear entirely, taking the form of a crazed killer.
During the time, no one knew how to get rid of these tiny demons. Left and right, many people were possessed by these foul creatures. Until one day, a group of young priests assembled to exorcise any poor souls who were possessed by the Jigo. The priests used a sealing technique known as the "Tiānshǐ", which not only removed the Jigo from any to all humans, but sealed the tiny demons away so they would no longer pose a threat to the human race. With the Jigo sealed away, humanity continued to prosper in a new era of peace. However, the threat of the Jigo was far from vanquished...
Author's Notes
Hi, there! SuperNekoBro here to tell you that this is the first fanfiction I'm writing for this site. As you can tell from the title, this is a Loud House fanfiction, but this fan story has a dark storyline as told by this prologue. The main character of this story is Leni. What role she'll play will be revealed in the next chapter. I'll accept any and all criticisms, so feel free to tell me things I should fix. Till then, so you in Chapter 2!