Spring of the 13th year of the Taisho period. Young man Kunugi Yukio met an alluring white serpent at the Yonagawa mansion while travelling to Tokyo. She explained to him that she ran away from home due to talks of an arranged marriage by her father, the eight-headed and eight-tailed great serpent, Izayoi. Thus, she was trying to seek help from the Bakeneko co. which also does business with apparitions. Brought along with the owner of Bakeneko co., Yonagawa Yogiri and the cat, Lord Mitama, Yukio enters the Town of Eternal Night where apparitions reside and finds his common sense of the human world being overturned—! Set in Yokohama after the Great Kanto earthquake, this is a tale of romance weaved between human and apparition.