: The show is an OVA (Original Video Animation) series consisting of four distinct episodes, each focusing on different stages of Kongou's battle against the school's supernatural residents. Urban Legend Origins The series draws heavy inspiration from Japanese Folklore : Toilet no Hanako-san vs Kukkyou Taimashi: Unleashing Horror

The story takes place in a bustling high school in Japan, known for its rigorous academic environment and rich cultural activities. Our main character, Nene Yashiro, is a first-year student renowned for his keen interest in occult tales and urban legends. The school, like many in Japan, has its share of myths and mysterious figures, one of which is Hanako-san, the spirit said to reside in a school toilet.