My Sister And Izuna(妹と油揚)

Divorcee Kyoko is living (indeed, sleeping) happily with her brother Tadashi until she starts to behave very strangely. The exorcist called in to examine her has no doubts: she is possessed by an Izuna, a malicious fox spirit called up by her ex-husband. No match for the Izuna himself, the exorcist retires, hurt. Tadashi is reduced to waiting hand and foot on the lzuna while Kyoko remains the Izuna's plaything. Worst of all, the Izuna has appalling table manners.