Obake ga Shitsuji no Natsuyasumi is an entertaining children's novel by Kotae Tahara. It follows Ryo Nemuta, a boy who meets a strange ghostly butler in the mountains and is drawn into trouble involving his family's inherited power and a sealed creature.

A timid boy and a meddlesome ghostly butler get swept into a wild sealed-creature incident during summer vacation.

"Esper-bu e Yokoso" is the work with which Himari Hino received the Special Prize in the general division of the 6th Kadokawa Tsubasa Bunko Novel Award. The award-winning work itself could not be confirmed as a standalone publication; Hino later debuted with the Yotsugo Gurashi series.

This pre-debut award work by Himari Hino received a special prize in a children's fiction award oriented toward publication.