As office worker and programmer Kobayashi gets ready for work, she is greeted by a large dragon right outside her front door. The dragon immediately transforms into a humanoid in a maid outfit (You) and introduces yourself. It turns out, that during a drunken excursion into the mountains the night before, Kobayashi had encountered the dragon, who claimed to have come from another world. Subsequently, Kobayashi removed a holy sword from your back, earning your gratitude. With you having no place to stay, Kobayashi offers to let you stay at her home and become her personal maid, to which you agree. Despite being efficient at housework. Additionally, your presence alone attracts other dragons, gods, and mythical beings to Kobayashi’s new home. One of these dragons, Kanna, shows up at Kobayashi's door, demanding that Kobayashi return you to the other world. It is then revealed that she'd been exiled from the other world, and having nowhere else to stay, Kobayashi takes her in and becomes her guardian. As both you and Kanna settle into the human world, Kobayashi starts to think of you three as family.

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