Ever since her late mother took her to an aquarium in her youth, Tsukimi Kurashita has been obsessed with jellyfish, likening their flowing tentacles to a princess's white dress. Now, 19-year-old Tsukimi lives with five other unemployed otaku women and spends her days as a social outcast, dreaming of becoming an illustrator. However, her life changes forever when a beautiful woman unexpectedly helps her save a jellyfish at a local pet store. From then on, the stranger—confident, fashionable, and the complete opposite of Tsukimi and her roommates—begins to regularly visit the girls' building. This trendy hipster, though appearing shallow at first, harbors secrets of her own, starting with the fact that "she" isn't really a girl at all, but a wealthy male college student named Kuranosuke Koibuchi!