Gonna Be the Twin-Tail!!

Souji Mitsuka, a first-year high school student, is utterly devoted to twintails, believing they represent the pinnacle of human beauty. He spends his days obsessing over the hairstyle, even founding a school club in its honor. But his passion catches the attention of otherworldly forces-alien monsters who invade Earth with the sole purpose of claiming all twintails for themselves. When a mysterious woman named Twoearle recruits Souji to fight back, he gains the ability to transform into the twin-tailed hero Tail Red. Together with fellow warriors Aika Tsube and Erina Shindou, he battles Ultimegil, an alien group bent on colonizing Earth and draining humanity’s "attribute power." Souji must now defend the twintails he loves while facing an enemy determined to take them away.