Onmyoji: It's Not Too Much to Summon a Shikigami to Be Your Wife, Right?

I accidentally discovered the Hundred Monster Genealogy left by my ancestors two thousand years ago, which recorded the true names of hundreds of monsters. When Watanabe Megumi inherited the Hundred Demons Spectrum... An emperor-level shikigami? Oh, sorry, that's my shikigami. A monarch-level demon? Sorry, it's also my contract beast. Nine-tailed demon fox? I'm going to let her warm the bed. Yamata no Orochi? I'm going to let it look after the home. … More than two thousand years have passed, and even the little demon at that time has now become the dominant demon king. As their owner, you ask me, what else am I missing? It's not too much to be short of a wife, right? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.