Gonna be the Twin-Tail!!

, abbreviated , is a Japanese light novel series written by Yume Mizusawa and illustrated by Ayumu Kasuga. Shogakukan has published 22 volumes under their Gagaga Bunko imprint since June 2012. An anime adaptation produced by Production IMS aired in Japan from October 9, 2014 to December 25, 2014. Plot Soji Mitsuka, an ordinary high school boy, has an obsession for twintail hair. He encounters a mysterious girl named Twoearle, who is from a parallel world, when monsters appear in his town and declare that all twintails in the world belong to them. These monsters feed off "attribute strength", the spiritual energy of humans. Twoearle entrusted Soji with Tail Gear, imaginary armor initiated by powerful twintail attributes. With the armor, Soji transforms into a girl and branded Tail Red, to protect Earth. Characters Twintail Warriors Soji (male) Souji (female)/Tail Red The main protagonist, a gentle-natured 15-year-old freshman of Yōgetsu Private Academy, who is obsessed with the twintail hairstyle. One day, he encounters a mysterious beautiful girl named Twoearle, who appears before him from a parallel world. At the same time, monsters begin to appear in town, and they start attacking the citizens. In the midst of the chaos, Twoerle entrusted him with attribute power, thus suddenly transforming him into a twin tail warrior girl, known as Tail Red. Due to his alter ego (Tail Red) becoming popular quickly after his debut and him being the first twintail warrior to transform, he is the leader of the Twintails. His weapon is . In volume 4, he gained two power-up forms: Riser Chain and Faller Chain. He later gains Ultimate Chain, after regaining his Twintail Elémera, which he lost to Tyranno Guildy.