Gonna Be The Twin Tail

Welcome to the Gonna be the Twin Tail Section of the Animanga Wiki
Gonna be the Twin-Tail!! (俺、ツインテールになります. Ore, Tsuintēru ni Narimasu.?, I Will Become a Twintail.), also known as Ore, Twintail ni Narimasu. or in its short form OreTwi (俺ツイ?), is a Japanese light novel series written by Yume Mizusawa and illustrated by Ayumu Kasuga. Shogakukan has published twelve volumes under their Gagaga Bunko imprint since June 2012.

An anime adaptation produced by Production IMS began airing in Japan on October 9, 2014.

Summary of the entire anime series
Soji Mitsuka is an ordinary high school boy who has an overwhelming obsession for girls who wear twintail hairstyles. He spends a good deal of his time at school observing all the girls who wear their hair in twin tails, and classifying them as to their hair color, length, and style. One day he encounters a mysterious young woman named Twoearle, who is from a parallel universe, and she informs him that there is an immediate danger to all inhabitants of Earth. Monsters from another dimension, who invaded Twoearle's planet and have already trashed it, have now come to Earth to 'harvest' human powers. Teenage girls have the highest angst power, so they declare that all Twin Tail Girls on Earth now belong to them, so as to strip them of their powers. These monsters, called Eremerians, feed off "attribute power", the spiritual energy that humans have.

Twoearle conscripts Soji to defend the Earth, and entrusts him with Tail Gear, defensive armor imbued with powerful twintail attributes and fighting abilities. But Tail Gear can only be used by young females who wear their hair in twintails. So to be able to use the armor, Sōji goes through a " Henshin " ( Transformation Sequence ), to change from a typical teenage male, into TailRed, a cute, adolescent female Twintail Warrior (ツインテイルズ関係者 tsuinteiruzu kankei-sha?), and is given the daunting task of protecting the people of Earth from the monster invaders. As TailRed confronts each monster, she finds that, for some unexplained reason, each monster has a strong propensity for acquiring and presenting different kinds of human fetishes at the most inopportune times, like when engaging in battle, even though each of the monsters knows that their own particular fetish tends to be quite distracting to them when they are in battle. TailRed is hampered in battle, too, as she finds it difficult to acquire and control her new powers and weapons. Soon, two other ordinary girls, who happen to wear their hair in twintails, are conscripted and given Tail Gear, and become TailBlue and TailYellow. Now with three Twin Tail Warriors, will the tide of battle turn in favor of the humans ? But another, even bigger, battle begins. Can Soji, who as a guy, could only admire girls who had twintails, be able to actually wear his hair in twin tails, and can successfully transition from male to female, and become a proper female Twin Tail Girl Warrior themselves ?