* FanNickname: Since the show started airing, a large number of viewers refer to the main girls by their hair color:
** Natsumi is Orange.
** Saki is Yellow.
** Yuka is Green.
*** A more specific nickname for her is Green Saten, due to the similarities to [[Manga/ACertainScientificRailgun Ruiko Saten]].
** Rinko is Pink.
* FridgeLogic: In episode 9 Saki turns invisible while taking a dip in a hot spring with her friends. She still ''remains tangible'' which is confirmed by Yuka using the "hands on" approach to search for her accidentally groping Saki in the process, much to her chagrin. Which is completely unnecessary as a "cavity in the water" caused by presence of Saki's body should give away her position. Except ''there's no cavity''. Huh? [[ArtisticLicensePhysics How is that possible? Saki is still tangible, remember?]]
* MemeticMutation: Some people used [[http://cfile21.uf.tistory.com/original/1538C03B505C44350DDC23 the image]] of Natsumi and her clone pointing at each other as an anime offshoot of [[Memes/SpiderMan the famous Spider-Man meme]].
* {{Shipping}}: After that ''[[LesYay infamous]]'' second episode, fans began shipping Natsumi/Saki and Yuka/Rinko. Considering that the anime is centered around these girls, this isn't much of a surprise.
* TheyChangedItNowItSucks: Several fans were not happy about the OVA's ArtShift, especially about the girls' looks after the TimeSkip. Natsumi in partciular looks ''too boyish''.
* ViewerGenderConfusion: Koharu. She looked so boyish prior to Episode 9, some fans mistook her for a boy. In that episode, she is slightly more feminine.
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