Another entry in the long list in the [[HaremGenre Harem]] genre. The story follows Taiga, [[BlatantLies an ordinary high school student]], and his [[HumanAlien sister]] [[InnocentFanServiceGirl Tubame]]. Taiga cannot remember anything up to a few years ago and relies on Tubame to take care of him after an accident that he cannot remember killed their parents.

Can be read [[http://unixmanga.com/onlinereading/Tsubame_Syndrome.html here]]
----
This anime provides examples of:
* AccidentalPervert
* BewareTheNiceOnes: Taiga. Holy ''Shit'' is he ever this trope. For the first few chapters he comes across as sweet-natured LivingMacGuffin who has to rely on Tubame to protect him from Phantoms. Then in chapter 12 he gets cornered by a rampaging Phantom, which prompts [[SuperpoweredEvilSide ''another'', much more dangerous Taiga]] to come out and play. We don't see what happens next, but when Tubame and Ura finally bust their way into the room, they find a very tired and confused Taiga propped up against what's left of the Phantom after ''something'' ripped it shreds.
* ClothingDamage: Often.
* DarkerAndEdgier
* EldritchAbomination: The Phantoms.
* {{Fanservice}}: UnwantedHarem. Need I say more?
* FuroScene
* MarshmallowHell
* SpellMyNameWithAnS: Tubame/Tsubame
* UnwantedHarem
----