Kaguya is supposed to be the god of plagues and frost, a god who in his past life was the crown prince of great Japan, but his actions do not show the same.

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Kaguya was born the only child of the Empress and Emperor of Japan, and was a horrible person from childhood until his death, when he ascended to God. The sun goddess (Amaterasu) believed there was still a little goodness in Kaguya, but no! And she sent him to do community service on earth.

Now he's surrounded by filthy commoners who don't bow well enough, the laws aren't like they were in the Heian era anymore, and if that weren't enough, he's now married to a demon who's too good for him, well, that's what everyone thinks except Kaguya.