Under Heaven's Family

is a Japanese light novel series written by Akara Arisato and Nemu Mukudori, with illustrations by Nemu Mukudori. The series began publication on September 10, 2001 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
In order to recover the sin treasure summoned to the human world, the Mephisto family of demon world investigators came from the demon world-! Includes 3 short stories. A super-luxury book presented with the powerful tag of Akara Arisato & Nemu Mukudori, familiar from "HAUNTED Junction"! The original short story reveals not only the life of the demon world but also the episode of the first mission of the demon world investigator! A little centimeter and a little funny story unfolded by a slapstick family from the demon world.