Miss Kobayashi is an average office worker who lives a boring life, alone in her small apartment until she saves the life of a female dragon in distress; the dragon, named Tohru, has the ability to magically transform into an adorable human girl.
When Tohru plays the lottery at the shopping district, she wins a prize, a kotatsu, not the hot springs trip; once they finally join Miss Kobayashi in the kotatsu, the dragons start lazing around; the kotatsu ruins not only humans but dragons too.
Tohru's now capable of handling the housework perfectly, and at Miss Kobayashi's request, she decides to make the best omurice for dinner one night; however, gathering high quality ingredients would put her over budget.
The day off is peaceful, and Miss Kobayashi spends her time relaxing with the others as usual. While out shopping, Tohru suddenly stops to think on the street: Miss Kobayashi is human, and what will she do when her lifespan runs out and she dies?
The self-proclaimed ultimate maid Tohru storms into a new maid café opening up soon with a sense of rivalry.