In Shimoda City, there is a Shinto shrine centered around a large rock. Legend has it that if four close friends make a single wish upon it, the wish will be immediately fulfilled.

Such a legend was tested by four middle school girls and ChildhoodFriends: stubborn Natsumi Aizawa, realist Saki Mizukoshi, hyperactive Yuka Hanaki, and laidback Rinko Tamaki.

A few days before summer vacation, Natsumi and Saki had a falling-out. To rub salt onto the wound, the next day Saki reveals that she plans on transferring schools. To help them make up, Yuka and Rinko invite them to the shrine. As they stare onto the skies, the rock emits a strange glow, and before they knew it, the four girls are flying.

Thus begins a summer vacation unlike any other.

''Natsuiro Kiseki'' is a SliceOfLife SchoolgirlSeries anime produced by Creator/{{Sunrise}} for the Spring2012Anime season, with a manga illustrated by Tatsuhiko which came out during winter 2012. In reinforcing the theme of friendship, Natsumi, Saki, Yuka and Rinko are all voiced by the members of J-Pop group Music/{{Sphere}}, themselves NamesToKnowInAnime: Creator/MinakoKotobuki, Creator/AyahiTakagaki, Creator/HarukaTomatsu and Creator/AkiToyosaki, respectively.
!!This series provides examples of:
* ACupAngst: Yuka and Rinko when they find out that the well-endowed Chiharu is their age.
** One of the first things Yuka does after switching bodies with Saki is to look down her top and seemingly being very pleased with what she sees.
* AccidentalPervert: Koharu gets a bucket to the face for seeing the girls in the bath. [[SubvertedTrope Then they find out that]] [[{{Bifauxnen}} she is a girl too]].
* AlmostKiss: Between Yuka (in Saki's body) and Takashi. Rinko (in Natsumi's body) grabs her and they run off.
* AnguishedDeclarationOfLove: Natsumi was clearly headed toward one during that talk with Saki in episode 8. [[MomentKiller Curse you, Yuka!]]
** It seems though that Saki got the message nevertheless.
* BeCarefulWhatYouWishFor: The big rock can grant you a wish, in unexpected ways.
* {{Bifauxnen}}: Koharu, the tanned surfer who rescued Yuka.
* CensorSteam: Plenty in the HotSpringsEpisode, and even then not everything is covered.
* CurtainsMatchTheWindows: Saki, Natsumi and her brother Daiki.
* DatePeepers: After the body switch in Episode 4, Saki, Natsumi, and Rinko spy on Yuka and Takashi's date.
%% commented out as ZeroContextExample * DoItYourselfThemeTune
* DumbassHasAPoint: Natsumi in episode 11:
-->'''Natsumi:''' Yuka said something reasonable!
* EvenTheGirlsWantHer: According to Yuka and Rinko in the OVA, Natsumi is very popular between girls and boys.
* ExpositoryHairstyleChange: In the OVA, Rinko has grown her hair a bit and Natsuki doesn't wear hairclips anymore. Her hair is a bit shorter too.
* {{Flight}}: What the girls receive at the end of Episode 1 from the enchanted rock.
* FreakyFridayFlip: Episode 4. Saki/Yuka and Natsumi/Rinko
* FourGirlEnsemble: Yuka (Sweet), Saki (Smart), Rinko (Sexy), Natsumi (Snarky).
* FourTemperamentEnsemble: Yuka (Sanguine), Natsumi (Choleric), Saki (Melancholic), Rinko (Phlegmatic).
%% commented out as ZeroContextExample * GenkiGirl: Yuka.
* GilliganCut: When Yuka suggests taking advantage of the GroundhogDayLoop in Episode 12 for a second chance at the idol audition.
--> '''Yuka:''' We've done it once, so I won't trip this time! It's perfect!\\
''[cut to Yuka crying outside, in the exact same pose as the first time]''\\
'''Natsumi:''' At least you didn't trip this time.\\
'''Saki:''' I never thought you of all people could forget what move to do.
* GroundhogDayLoop: The last episode. [[spoiler:With the girls having RippleEffectProofMemory and Rinko's mom somewhat as well.]]
* HairDecorations: Natsumi wears two hairclips in her bangs. Yuka also wears hair decorations many times, due to her common change of hairstyles.
** Rinko in the OVA wears a headband.
* HardHead: Koharu, after Natsumi hurls a bucket at her.
* HelpYourselfInThePast: More like your past selves who traveled to the future in episode 10
* HollywoodHypeMachine: In-universe Japanese variant. [[IdolSinger Four Seasons]] used to be all over the media but now only their most devoted fans remember them (Like Yuka).
* HotSpringsEpisode: almost half of episode 9 has the for girls in an open air bath
* IdolSinger: The series is basically a vehicle for the real-life idol group Music/{{Sphere}}. References to idols pop up frequently, though it remains to be seen if this ever actually factors into the plot.
** The idol group Four Seasons are Yuka's favorite musicians (though nobody else seems to remember them or thinks they broke up).
* KissingCousins: Yuka's senpai Takashi is apparently also her cousin.
* {{Miko}}: Rinko works at her family's shrine, where the rock is located.
* OffModel: Constantly, including several instances of characters having six fingers.
* ProductPlacement: Lawson is the show's main sponsor, and the girls often hang out at a local Lawson convenience store.
%% commented out as ZeroContextExample * TheQuietOne: Rinko.
* RealPlaceBackground: Shimoda is an existing town in Japan's Shizuoka prefecture, and is rendered in painstaking detail.
* RomanticTwoGirlFriendship: [[spoiler: Natsumi makes this one with Saki near the end of Episode 8. Natsumi tells Saki to be honest with herself of not wanting to move, to the point where it almost ends in a love confession by Natsumi. Sadly, she is interrupted by Yuka.]]
* SceneryPorn: Shimoda is located on Japan's ''extremely'' scenic Izu peninsula, which gets milked for all its panoramic splendor.
* SchoolgirlLesbians: Lots of [[ShipTease ship teasing]] with Natsumi and Saki. Natsumi's orientation seems confirmed by the [[FreakyFridayFlip body-swap]] episode when Rin suggests Natsumi might like to swap with one of the members of The Four Seasons so she could ... get closer to the lead singer. Cue yurific ImagineSpot.
* SchoolgirlSeries
* {{Seinen}}: The manga runs in Creator/SquareEnix's Seinen magazine.
%% commented out as ZeroContextExample * SheIsAllGrownUp: The girls in the OVA.
* ShoutOut: In Episode 5, Yuka doesn't get the Four Seasons poster that she asked for. Instead, she gets a free ''Anime/MobileSuitGundam00'' poster.
** In Episode 8, when the girls are shopping for swimsuits, there's a slightly obscured sign that looks like it reads "Anime/MaiHime".
* SickEpisode: Episode 5.
* TheyWouldCutYouUp: Rinko's explanation to Yuka as the reason why they can't tell anyone about the abilities the rock can give them.
* TitleDrop: It turns out that "Natsuiro Kiseki" [[spoiler: is the title of the book Rinko wrote during the timeskip, based on the events they experienced with the magical rock.]]
* TomboyAndGirlyGirl: Natsumi/Saki and [[spoiler:Koharu/Chiharu]].
* VomitDiscretionShot: This happens when Yuka gets seasick in Episode 8.
* WhamLine: A minor one in the last episode. While Rinko seems to notice that her mother doesn't use the exact same words to say goodbye to her every repeated morning, she doesn't realize how much she knows about what's been going on until she asks when they're planning to come back (from the time loop).