Wizard Dia is sent to break the captive demon Bahamut and make him his kin, which he does using carnal pleasure. Only much to Bahamut's dismay, it turns out Dia is a slut with plenty of demon kin to go around. Bahamut overcomes his intital disappointment and tries his best to support Dia as he does his best to keep peace between humans and demons. But the king Dia answers to has a different goal than peace in mind. Dia is beautiful and the story is silly but still touching at the end. I also really like the different types of demons, even if they don't get a lot of time. Trigger warnings: noncon, sex work(?), harem.
Joukyuu Mazoku no Otoshikata