About

You can stream Hybrid x Heart Magias Academy Ataraxia (2016) on Crunchyroll with a subscription.

Hida Kizuna possesses the HHG (Heart Hybrid Gear) ability, but it is not strong enough to make him particularly important. His older sister calls him to transfer to a strategic defense school, where many of the students (many of which are large-breasted girls) use their HHG abilities to fight invaders from another world while wearing extremely skimpy pilot outfits. Kizuna's fighting ability doesn't measure up, but his sister has another plan—apparently having erotic experiences with Kizuna will allow the girls to replenish their energy or power-up. It looks like his new school life is going to be full of embarrassment.

A mediocre combat ability forces a transfer student to prove his worth among a squad of elite, highly-curvaceous warriors. This frantic academy setting pits supernatural gear against an invading otherworldly force in a chaotic blend of combat and fanservice.