TV series
Souji Mitsuka is a first-year high school student who is obsessed with twin-tails. One day, a beautiful girl from a parallel world named Twoearle, suddenly appeared in front of him and gave him the power to transform into the twin-tailed warrior Tail Red. With the Ultimegil organization attacking the planet, Souji now must fight in order to protect the peace on Earth.
Streaming, rental and purchase options
Checked Sep 3, 2026
Gonna Be the Twin-Tail!! is available to stream on Crunchyroll Premium (Via Amazon Prime) in United States. Use the direct links below to open the provider.
Souji Mitsuka is a first-year high school student who is obsessed with twin-tails. One day, a beautiful girl from a parallel world named Twoearle, suddenly appeared in front of him and gave him the power to transform into the twin-tailed warrior Tail Red. With the Ultimegil organization attacking the planet, Souji now must fight in order to protect the peace on Earth.
Choose an episode, then use the watch options above for the show.
Episode 1
Soji Mitsuka loves the twin-tail hairstyle. Following his first day of high school, he and his childhood friend Aika Tsube are enilisted by a mysterious woman named Twoearle to fight an evil force that threatens twin-tails worldwide!
Directed by Tooru KitahataWritten by Naruhisa ArakawaGuest stars Rie Kugimiya
Episode 2
Twoearle answers Soji and Aika's questions about the Tail Gear, including why Soji turns into a girl. Twoearle proposes building a secret support base under Soji's house, but to do so entails serious consequences for Soji's living condtions!
Directed by Yoshimasa IshiyaWritten by Naruhisa Arakawa
Episode 3
Twoearle gives the others a tour of the newly-completed secret base. When an Elemelian appears, Soji goes into action to stop the attack, but he soon finds himself in over his head. It's going to take another Tail Gear warrior to rescue him!
Directed by Masayuki MatsumotoWritten by Naruhisa Arakawa
Episode 4
The Ultimaguil forces find themselves fighting an uphill battle against Twin-Tails, and Dragguildy himself decides to attack in person. Tail Red and Tail Blue step forward to stop him, but Dragguildy reveals a secret that could change everything!
Directed by Masashi AbeWritten by Naruhisa Arakawa
Episode 5
The Twin-Tail Club is just about ready to start, and Twoearle gives the club's classroom her own touch. With Ultimaguil on the ropes, some new reinforcements arrive to try to turn the tide, but the Twin-Tails add a reinforcement of their own.
Directed by Yoshimasa IshiyaWritten by Masaki Wachi
Episode 6
Erina's first outing as Tail Yellow does not go as expected, and she later confides to Soji that she may not be qualified to be one of the Twin Tails. While Soji tries to work with Erina, Aika must deal with an attack from Leviaguildy and Krakeguildy!
Directed by Shu WatanabeWritten by Masaki Wachi
Episode 7
Twoearle recognizes Dark Grasper as being Acena, one of her own fangirls from the past. Dark Grasper takes decisive charge of the Ultimaguil invasion force and climbs her way up the pop charts as her alter-ego, the twin-tail idol Anko Iisuna.
Directed by Masayuki MatsumotoWritten by Naruhisa Arakawa
Episode 8
Student council responsibilities, school work, and Twin Tails activities are taking their toll on Erina, and when her mother pushes her to straighten up, Erina pushes back. When Mikoto is unavailable, Soji must secretly escort Erina on a shopping trip.
Directed by Tooru KitahataWritten by Masaki Wachi
Episode 9
With the realization that Anko is Dark Grasper, the Twin Tails find a hidden message in her lyrics. They decide to go to her concert to stop her from potentially holding thousands of fans hostage, but Dark Grasper has other plans in store.
Directed by Yousuke HashiguchiWritten by Naruhisa Arakawa
Episode 10
Spider Guildy, a formidable Elemelian officer, arrives to deal with the Twin Tails. Their fierce confrontation ends in a draw, but a surprisingly intense attack leaves Tail Red dazed.
Directed by Masashi AbeWritten by Masaki Wachi
Episode 11
Soji awakens to find himself in the form of Solar Metca, a slightly more grown-up version of Tail Red. He also comes up short in combat with an Elemelian, and the others become concerned about him...
Directed by Yoshimasa IshiyaWritten by Masaki Wachi
Episode 12
Soji feels as though his twin-tails have forsaken him, and the other girls try to cheer him up. When Arachne Guildy strikes, Aika and Erina respond, but are overwhelmed.
Directed by Hiroyuki KambeWritten by Naruhisa Arakawa
Episode information updated Sep 17, 2026
Nobunaga ShimazakiSouji Mitsuka ♂ (voice)
Sumire UesakaSouji Mitsuka ♀ / Tail Red / Solar Metca (voice)
Yuuka AisakaAika Tsube / Tail Blue (voice)
Maaya UchidaTwoearle (voice)
Chinatsu AkasakiErina Shindou / Tail Yellow (voice)
Mika KanaiWorm Guildy (voice)
Yoko HikasaIisuna / Anko Iisuna / Dark Grasper (voice)
Rie KugimiyaStrawberry Twin (voice)
TBSJapan
Production IMSJapan
Pony CanyonJapan
DAX ProductionJapan
RayJapan
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