Edomae Elf or Otaku Elf intrigued me since it was a Miko girl looking after a 600-year-old something elf lady named Elda. Koganei Koito, the new shrine maiden, discovers that Elda spends her time doing otaku stuff.
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Edomae Elf – First Impressions – The Elf that Loves Video Games, Anime, Manga, and Other Otaku Stuff