The night of erosion (prequel)

"A world where unidentified monsters appear. I suddenly became a monster, too!" Suddenly, at night, forms of life that could never be called human began to appear. Its big enough to be over 2m, and its disgusting smell and skin that repeats corrosion and regeneration, and even red inside. There were many reasons to be afraid. The monster was originally human, but at night it always turned into its hideous obscurity, and instead of sleeping, it spread fear by walking down the street. Many specula...