The sudden shift in the tone of the story. For instance, an anime that starts off as a normal slice - of - life might suddenly turn into a horror - filled nightmare. It's unexpected and catches the reader off - guard.
One popular creepypasta anime story is 'The Red Room'. It involves a disturbing and mysterious room that appears in various anime settings, often associated with death and horror. Another is 'Kuchisake - Onna', which is based on the Japanese legend of the slit - mouthed woman and has been adapted into some really creepy anime - inspired tales.
Creepypasta anime stories are usually darker. Regular anime stories cover a wide range of genres like action, romance, comedy etc. But creepypasta ones focus on horror, the supernatural, and often have disturbing elements. For example, a regular anime might have a hero's journey, while a creepypasta anime story could be about a character being haunted by a malevolent spirit.
A rather spooky one is about an anime that seems normal at first but then starts to have glitches and strange happenings. For example, characters' faces might distort in a really creepy way during certain scenes. These elements add to the overall creepypasta feel, as if there's some sort of malevolent force at work within the anime world.