[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/koikoi7-1.jpg]]

Tetsuro Tanaka finds out he's been accepted to a new school. A girls' school, and he's the lone male there. Within a day of his arrival, he's treated to the AlphaBitch StudentCouncilPresident and her GirlPosse, and gets himself a MagicalGirlfriend, Yayoi Asuka, who shares the name of his childhood friend. He finds himself staying in Yayoi's dorm along with her five friends. Something's not quite right about them. They're all [[HollywoodCyborg cyborgs]], and together they form the Koi Koi 7. Which only has six members. Tetsuro learns about each of the girls he lives with, and they in turn defend him (and Yayoi) from Miya's almost daily attacks.

What starts off like a typical UnwantedHarem turns into a story of conspiracies, things given up and things that want to be regained - a foreshadowed yet powerful GenreShift. The manga, by Morishige (creator of ''HanaukyoMaidTai'') ran for 9 volumes, and was adapted into a [[CompressedAdaptation considerably different]] anime that nonetheless retains the quirkiness of its source.
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This anime provides examples of:

* AlphaBitch: Miya.
* AmazonBrigade
* BarbieDollAnatomy: Averted. Oh, so averted.
** Only in the manga. The anime plays it straight.
** Sort of...
* [[AscendedFanboy Ascended Fangirl]]: Akio the Sentai fan gets a chance to actually be a hero with her powers.
* AttractiveBentGender: Tetsuro's female crossdressing identity of Tetsu''ko'' is Miya's love interest. Awkward.
* BeachEpisode: The final episode, featuring an extended nude fighting sequence. The manga prefers a [[HotSpringsEpisode hot spring]] for its finale.
* CuteBruiser: Hifumi
* TheDitz: Yayoi Asuka (pink-haired one)
* EmotionlessGirl: Otome and Celonius 28
* ExcitedTitleTwoPartEpisodeName: E.g: "Girls Bravo! Sway, Flow! The Counterattacking Miya-sama"
* EyepatchOfPower: Gantai-chan. It's where she got her name from, after all.
* {{Fanservice}}
* FlyingBrick: Akio
* ForeheadOfDoom: Miya, which she is teased about by Sakuya.
* FountainOfYouth: Gantai-chan (the other Yayoi) after being rebooted in one of Otome's spare bodies.
* GainaxEnding: While a DVD {{omake}} somewhat helps to clarify what happened, it's still one of the more "huh?" endings out there. The manga ending is somewhat less vague, but equally confusing.
* {{Gainaxing}}
* GirlPosse: The Wayouchuu Sisters.
* TheGunslinger: Sakuya, who has a preference for {{BFG}}s and {{Hand Cannon}}s.
* HairColors
* HaremNanny: Orie. In this case, that means repairing the girls. She's also their teacher.
* HollywoodCyborg
* HollywoodToneDeaf: Miya's rendition [[ThemeTuneCameo of the show's OP]]. There are no survivors.
* HumongousMecha: Piloted by Miya and crew. All of them are trashed.
** Evidence of ShoutOut here as well -- most of the mecha are obviously patterned after Zeon Mobile Suits (and one in Episode 5 is the SDF-1 from Macross complete with a ship for an arm)...
* ImageSong
* InnocentCohabitation: Tetsuro's room is next to Yayoi's. She ''smashed the wall'' to make it a two-person room.
* InTheNameOfTheMoon: Done when the girls first appear as a team, with the expected heroic music and [[SuperSentaiStance posing]].
* LoveIsInTheAir: The events of episode 12 lead to Tetsuro being swarmed by a herd of girls in love with him. Yayoi and friends are spared from this by being cyborgs.
* NoblewomansLaugh: Miya.
* OneSteveLimit: Two Yayoi Asukas. It's best that Miyabi and Miya don't get confused either.
* OrdinaryHighSchoolStudent
* PantyThief: Akio's temporary archenemy in episode three. Somehow morphs into an [[Anime/NeonGenesisEvangelion EVA]].
* PowerGivesYouWings: Both Yayois, most evident in the OP sequence.
* PrehensileHair: Miyabi, who also has some {{shapeshifting}} powers.
* ThePsychoRangers: Miya creates a squadron of ''her'' closest followers.
* SchoolgirlLesbians: Yamada and Satou, who are ''definitely'' lesbian for each other, and not hiding it.
** Miya is also clearly one, seeing how she falls for Tetsuro in his female disguise.
* {{Sentai}}: Koi Koi 7 themselves, as well as Akio's favorite ShowWithinAShow, ''Kinoranger''.
* ShoutOut: Episode 7, "Storm of White Lilies", to ''[[LightNovel/MariaSamaGaMiteru Mari Mite]]''.
* SquashedFlat: Four of the girls are trampled flat.
* StockFootage: The anime has a few instances.
* SuperSentaiStance
* {{Technopath}}: Otome, to an extent.
* UnwantedHarem
* VerbalTic: Yayoi's "desu" is the most obvious (it even makes it into the episode titles), but most characters have one.
* WingedHumanoid: Both Yayois. [[ColorCodedForYourConvenience White wings and black wings, respectively.]]
* YouGottaHaveBlueHair: Just look at the picture.
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