Gonna be the Twin-Tail!! anime
Twintails: the attractiveness of mankind–or at least that’s what first high school pupil Souji Mitsuka considers. At college, Souji spends all the time daydreaming and score women’ twintails, even going as far as developing a club devoted to the hairstyle. His obsession doesn’t go undetected, however; if monsters from outer space assault Earth and assert the planet’s twintails for themselves, a strange girl called Twoearle enlists Souji to battle back with twintails of his very own!By changing into the twin-tailed warrior Tail Red, Souji combats the vicious alien association called Ultimegil, whose primary aim is to colonize Earth and steal everybody’s spiritual power, or”feature power” Alongside fellow twin-tailed fighters Aika Tsube and Erina Shindou, Souji should discover a way to defeat the military and shield the twintails he holds dear.