Gonna be the Twin-Tail!! is a tV series anime that premiered in fall 2014, produced by Production IMS.

About the production: the story comes from a light novel, there are 12 episodes of about 24 minutes and its current status is "finished".

Its main genres are action, comedy, ecchi, fantasy and romance, with themes such as Henshin, Tokusatsu, Gender Bending and Primarily Female Cast.

On AniList, Gonna be the Twin-Tail!! has an average score of 61%, an average score, and appears on 41,527 users' lists.

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 transforming into the twin-tailed warrior Tail Red, Souji combats the vicious alien organization known as Ultimegil, whose main goal is to colonize Earth and steal everyone's spiritual energy, or "attribute power." Alongside fellow twin-tailed fighters Aika Tsube and Erina Shindou, Souji must find a way to defeat the invading army and defend the twintails he holds so dear.

Official synopsis from AniList.