Quick Answer
Gonna be the Twin-Tail!! is streaming on Crunchyroll. 12 episodes (~5h total watch time). Availability may vary by region.
Where to Watch Gonna be the Twin-Tail!!
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About Gonna be the Twin-Tail!!
Twintails: the glory of all mankind—or at least that is what first-year high school student Souji Mitsuka believes. At school, Souji spends most of his time daydreaming and rating girls' twintails, even going as far as creating a club dedicated to the hairstyle. His obsession does not go unnoticed, however; when monsters from outer space attack Earth and claim the world's twintails for themselves, a strange woman named Twoearle enlists Souji to fight back using twintails of his own! By...
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Where can I watch Gonna be the Twin-Tail!! legally?
Right now, Gonna be the Twin-Tail!! is on Crunchyroll. That said, anime licensing varies a lot by country — what's on Netflix in Japan might not be on Netflix in the US. If your go-to platform doesn't have it, try the other services listed above.
Is Gonna be the Twin-Tail!! on Netflix or Crunchyroll?
It's confirmed on Crunchyroll. Netflix availability depends on your region — some countries have it, others don't.
Is Gonna be the Twin-Tail!! available with an English dub?
Dub availability depends on the platform. Crunchyroll has been expanding their dubbed library a lot recently, and Funimation (now merged into Crunchyroll) historically had the biggest dub catalog. Check each platform's listing for Gonna be the Twin-Tail!!.
Can I watch Gonna be the Twin-Tail!! for free?
Crunchyroll offers a free ad-supported tier for some shows. Most other platforms require a subscription, but many offer free trials for new users. Tubi and Pluto TV occasionally have anime in their free rotation too.