Ultraman S37E08 - The Legend of Mt. Kirifuri

Mt. Kirifuri is a place with frequent reports of paranormal phenomena. Ayumu asks Sorato and Kosei to accompany her there to visit a paranormal research club studying the Brigadoon phenomenon, which they claim occurs in the mountain's thick mist. When an accidental occurrence of the phenomenon opens up another dimension, Ayumu ends up lost inside!