How long is Deng Qing's Mysterious Tales suitable for watching?

18 years old or older. The green light is a novel adapted from a mysterious story, in which many anecdotes are recorded. The story is scary, not suitable for minors, but suitable for people over 18. The Story of the Mystery is a collection of stories of the Story of the Mystery, with 18 anecdotes involving monsters. The author, Keita Okamoto, used to be a journalist. He is the main writer of Japanese new kabuki plays.