In the 1970s, there was a terrifying legend among elementary and middle school students in Japan: when walking alone near the park after school, you would encounter a woman wearing a white mask and a red windbreaker. When she met a passerby, she would take off her mask, revealing a terrifying big mouth that was split to the ears, and ask the other person, "Am I pretty?" If the answer was not pretty, she would disfigure the other person; if the answer was pretty, she would make the other person look like herself; if the other person ran away, she would catch up at a very fast speed. The name of this woman is: Slit-mouthed Woman. For a time, people in all schools were in panic. Both male and female students were afraid of encountering this terrible woman, while adults scoffed at this rumor. But with the occurrence of an ominous earthquake, the Slit-mouthed Woman finally arrived...