[[quoteright:231:http://static.tvtropes.org/pmwiki/pub/images/futa.PNG]]
[[caption-width-right:231:If he screws this up, there will be a ton of birds flying around.]]

'''''Futakoi''''' is a 2004 anime and visual novel series created by Mutsumi Sasaki. It tells the story of a boy named Nozomu Futami who goes back to his home town, moving in near a shrine. This shrine contains a stone, which, according to legend, turned two twin girls into birds. They chose to turn into birds because they were both in love with a man who would not pick one or the other. Soon Nozumu inherits the same problem, winding up with his own 12-girl, 6-sets-of-twins, harem.

In 2005, a 13 episode anime [[SpinOff spin off]], and later a manga, titled ''Anime/FutakoiAlternative'' was made. While this series contains the same characters as the original, it has a different story line and continuity altogether.

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!!This series provides examples of:

* AlternateContinuity: From FutakoiAlternative.
* BattleButler: The Sakurazaki sisters's butler.
* ChildhoodMarriagePromise: Nozomu and the Ichijou twins.
* ColorCodedCharacters: Each set of twins have at least one change in coloring in their outfits so they can be told apart.
* CoolOldGuy: The Sakurazaki sisters's butler.
* ADogAteMyHomework: Nozomu has a similar problem with a goat constantly eating his homework, and no one believing him.
* GirlishPigtails: Rara and Ruru both have these.
* LoveDodecahedron: Nozomu, his 12-girl harem, their crushes/fanclub... It gets complicated
* {{Meganekko}}: Both of the Chigusa sisters, as well as Mai Momoi.
* NoGoodDeedGoesUnpunished: Nozumu. In the first episode, he tries helping the Sakurazaki sisters, only to get his ass kicked.
* {{Ojou}}: The Sakurazaki sisters.
* PinkySwear: Done by Nozomu and the Ichijou sisters as children, agreeing that he would marry both of them.
* SchoolUniformsAreTheNewBlack: Some of the twin sets.
* SiblingYinYang: All sets of twins, to one degree or another
* ThemedHarem: The whole point.
* TokenMiniMoe: The Hinagiku sisters, though there are two of them, fit this trope
* TwinBanter
* TheUnfavorite: Ichijou Kaoruko hides her feelings from her sister because she is this.
* UnluckyChildhoodFriend: The Ichijou sisters.
* UnluckyEverydude: Nozumu.
* UnwantedHarem
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