* TheDanza: Yuu Shimamura, the ClassRepresentative, is voiced by Creator/YuShimamura in the anime. Her name wasn't revealed until chapter 49, which was published after the anime ended.
* NamesTheSame[=/=]{{Expy}}: Kuesu's name and character design are lifted straight from a similarly named character from ''Palladium Garden'', Matra's previous {{Hentai}} work.
* NoExportForYou: The LightNovels, ''Book of the Gaiden'', and the {{Yonkoma}} adaptation (only a section of it was put in Volume 0) are have not been released outside its native Japan.
* PlayingAgainstType: Creator/MasamiKikuchi, known for voicing NiceGuy harem leads [[Manga/AhMyGoddess Keiichi]] and [[Anime/TenchiMuyo Tenchi]], plays the AffablyEvil [[{{Youkai}} Oni]] Shuten-douji. He actually does a good job in keeping the nice guy vibe while acting as an antagonist.
* PortmanteauSeriesNickname: ''[=OmaHima=]'', which is even used by [[WordOfGod the author himself]].
* WhatCouldHaveBeen: WordOfGod originally planned the series to end at the sixth volume. However, ExecutiveMeddling forced him to extend it to twelve.