Inukami! - Matsuzawa, Mari Arisawa, Mamizu

Inukami: a sacred being with a dog-like appearance that forges a contract with a powerful human tamer to help them eliminate evil monsters and demons.

Though Kawahira Keita is the descendent of a long line of Inukami-tamers, he seems to lack the necessary ability and has been forsaken by his family. One day, he meets a cute Inukami named Yoko, who, at first glance, looks graceful, obedient, and beautiful...but upon forging a contract with her, Keita discovers that Yoko is a wild and mischievous Inukami that no one has ever been able to control.

(Source: Seven Seas)

The first five volumes of Inukami! were published in English as individual volumes by Seven Seas from October 28, 2008 to January 5, 2010. The same publisher also released the series in two onmibus volumes from November 9, 2010 to March 1, 2011.