Gonna be the Twin-Tails!!, Ore, Twin tails ni Narimasu., 俺、ツインテールになります。
Ore, Twintails ni Narimasu.
Mitsuka Souji is a first-year high school student who greatly loves the "twintails" hairstyle. One day Twoearle, a beautiful girl who comes from another world, suddenly appears in front of him and gives him the power to transform into the twintails warrior TailRed. Now Souji, with the help of his childhood friend Tsube Aika, who can become the twintails warrior TailBlue, must fight in order to protect the peace on Earth.