Ozawa, a friend who went missing. He was the editor of an occult magazine, and before he disappeared, he had been reporting on ghost stories related to the area called ``●●●●●.'' Quotations from past magazine articles, strange experiences from readers, and posts on internet bulletin boards - in order to follow his footsteps, I read and deciphered the materials he had collected, and discovered that they had been treated as separate ghost stories. A certain connection emerges.