Gonna be the Twin-Tail!!

Twintails: the glory of all mankind—or at least that is what first-year high school student Souji Mitsuka believes. At school, Souji spends most of his time daydreaming and rating girls' twintails, even going as far as creating a club dedicated to the hairstyle. His obsession does not go unnoticed, however; when monsters from outer space attack Earth and claim the world's twintails for themselves, a strange woman named Twoearle enlists Souji to fight back using twintails of his own! By transforming into the twin-tailed warrior Tail Red, Souji combats the vicious alien organization known as Ultimegil, whose main goal is to colonize Earth and steal everyone's spiritual energy, or "attribute power." Alongside fellow twin-tailed fighters Aika Tsube and Erina Shindou, Souji must find a way to defeat the invading army and defend the twintails he holds so dear.

Gabriel DropOut

An angel at the top of an angel school has descended to the human world! However, she has already acclimated to the life of the human world so much that she ends up leading a self-indulgent life, skipping school all the time and being absorbed in online games. Gabriel soon forgets about her original goal to make human beings happy and has turned into a lazy and hopeless angel, or a “sloppy angel” in short. Amazingly, she swears to continue to fully enjoy the pleasure of various entertainments of the human world. (Source: Crunchyroll)

Date A Live

Thirty years before a strange phenomena called a "spacequake" devastated the center of Eurasia, claiming the lives of at least 150 million people. Since then, smaller spacequakes plague the world on an irregular basis. Shidou Itsuka, a seemingly ordinary high schooler comes across a mysterious girl at the ground zero of a spacequake and learns from his sister Kotori she is one of the "Spirits" who are the real cause of the spacequakes that occur when they manifest themselves in the world. He also learns that Kotori is the captain of the airship Ratatoskr and recruits him to make use of his mysterious ability to seal the Spirits' powers and stop them from being a threat to mankind. However, there is a catch: to seal a Spirit, he must make her fall in love with him. (Source: Anime News Network)

Symphogear

With the coming of spring, Hibiki Tachibana and Miku Kohinata start their first year in high school school at the prestigious Lydian Music Academy. That their idol, the singer Tsubasa Kazanari, also attends Lydian is just an added bonus. Neither of them know that their lives are about to change forever. Neither of them know that the first, awakening beat is almost upon them. (Source: Rightstuf)