Wagaya no Oinari-sama.

The Mizuchi bloodline has long been hunted by Yokai, or monsters. Toru and Noboru Takagami are descendents of this bloodline, and under their grandmother's discretion, are given a secret weapon to combat these monsters. It is Tenko Kugen, a fox deity who can take the shape of a man or woman at will. The mischievous deity is accompanied by a shrine maiden, Ko, who will both live with the Takagami brothers at their house. Life just got complicated. (Source: NIS America)Noboru and Toru are two brothers that have grown away from their family’s secret. The fact that their family can use the Water ki and can ward off demons. But when a demon is after Toru’s life, in order for the family to keep him safe they need to awaken the fox-spirit K?gen. K?gen will not help for the sake of the family but only for the sake of the children’s late mother.