Gonna Be the Twin-tail!!

All 12 episodes of the Japanese anime. When monsters invade his town, twin-tail-obsessed Mitsuka Souji (voice of Nobunaga Shimazaki) is granted special powers and transformed into the female warrior Tail Red (Sumire Uesaka), by mysterious alien Twoearle (Maaya Uchida), to fight them off.

The episodes are: 'Earth Is a Twin-Tail World', 'A Twin-Tail Mystery', 'The Azure Surge!

Tail Blue', 'Ferocity - Twin Battle', 'The Third Twin-Tail', 'Break Release!!

Tail Yellow', 'A Passionate Debut! Dark Glassper', 'Erina's First', 'Smash!! Chaotic Infinite', 'How Come? I'm in Bad Shape', 'Red On The Ropes' and 'Twin-Tails Forever'.