[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 girl.

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.

Having no place to stay, Kobayashi offers to let the dragon stay at her home and become her personal maid, to which she agrees, having fallen in love with Kobayashi.]