Shida Naori is a college student who loves making alcoholic drinks but has no friends to share them with. At a mixer, she meets Ibuki Hinata, who she ends up taking home with her. After making her a drink, Naori discovers that Hinata is an oni-girl descended from Shuten-doji who needs alcohol to live, can only drink alcohol offered to her by humans, and grows horns whenever she drinks. Thus, Hinata decides to make Naori her personal bartender.