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.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Earth is a Twin-Tail World | 2014-10-09 | 30 min |
| Season 1 | Episode 2 | A Twin-Tail Mystery?! | 2014-10-16 | 30 min |
| Season 1 | Episode 3 | The Azure Surge! Tailblue | 2014-10-23 | 30 min |
| Season 1 | Episode 4 | Ferocity--Twin Battle! | 2014-10-30 | 30 min |
| Season 1 | Episode 5 | The Third Twin-Tail! | 2014-11-06 | 30 min |
| Season 1 | Episode 6 | Brake Release!! Tailyellow | 2014-11-13 | 30 min |
| Season 1 | Episode 7 | Passionate Debut! Dark Grasper! | 2014-11-20 | 30 min |
| Season 1 | Episode 8 | Erina's First... | 2014-11-27 | 30 min |
| Season 1 | Episode 9 | Smash!! Chaosic Infinite | 2014-12-04 | 30 min |
| Season 1 | Episode 10 | How Come?! I'm In Bad Shape. | 2014-12-11 | 30 min |
| Season 1 | Episode 11 | Red on the Ropes | 2014-12-18 | 30 min |
| Season 1 | Episode 12 | Twin-Tails Forever | 2014-12-25 | 30 min |
| Visual Effects | Tetsuya Watanabe | CGI Director |
| Production | Hirofumi Ito | Producer |
| Production | Junya Okamoto | Producer |
| Directing | Hiroyuki Kambe | Series Director |
| Writing | Naruhisa Arakawa | Series Composition |
| Visual Effects | Kazuaki Morita | Character Designer |
| Sound | Maaya Uchida | Theme Song Performance |
| Visual Effects | Masahiro Yamane | Character Designer |
| Sound | Yasuharu Takanashi | Original Music Composer |
| Sound | Yuuka Aisaka | Theme Song Performance |
| Sound | Sumire Uesaka | Theme Song Performance |
| Sound | Chinatsu Akasaki | Theme Song Performance |
| Visual Effects | Ayumu Kasuga | Character Designer |
| Writing | Yume Mizusawa | Novel |
