Bonkura Onmyōji no Oniyome

Supporting her husband in mysterious incidents and battling her hateful mother-in-law at home!? A story of a demon-slaying working wife! Due to unavoidable circumstances, Nozaki Seri loses her home and enters into a contract marriage with a passing onmyoji, Kitamikado Koga, to make ends meet. However, while Koga has cute turtle and tiger shikigami (spirit familiars), he's a dim-witted onmyoji with no magical powers whatsoever...!? (Source: Kadokawa, translated)

*Note: Based on the light novel series of the same name by Miyabi Akita.*