Ore, Twintail ni Narimasu
(https://www.baka-tsuki.org/project/thumb.php?f=OreTwintail_v1_00a.jpg&width=300)
Ore, Twintail ni Narimasu (俺、ツインテールになります。) is a Japanese light novel written by Mizusawa Yume (水沢 夢) and illustrated by Kasuga Ayumu (春日 歩). The publisher is GAGAGA bunko. An anime adaptation aired from Oct 10, 2014 to Dec 26, 2014 consisting of 12 episodes.
Story Synopsis
For the sake of the Earth, I will become a twintail!
Mitsuka Souji is a normal high school student with an extraordinary passion for twintails. One day, Twoearle, a beautiful, mysterious girl who claims to come from another world, appears before him. And at the same time, monsters appear in the town where Souji lives!
"Fuhahahahaha! We will gather all the twintails of this world!"
They are creatures from another world who feed on the power of the human spirit, Elemera. Twoearle entrusts Souji with the Daydream Armor "Tailgear," which is powered by his intense twintail element, and he transforms into a young girl twintail warrior, TailRed!
From this day, an aberrant battle with TailRed and a little bit of transformation has begun!
Winner of the judges' award in the 6th Shogakukan Light Novel Awards.
Vol 1
http://sh.st/EiBaq
Vol 5
http://sh.st/NtaR6
Vol 5 added
My version of the PDFs
Volume 1: http://ah.pe/amk7
Volume 2: http://ah.pe/amki