Masou Gakuen HxH

Masou Gakuen HxH centers on Hida Kizuna, who is summoned to a strategic defense school after his older sister calls him there, only to find a harsh academy where students train to survive attacks from another world. Humanity relies on HHG (Heart Hybrid Gear), and every battle-ready trainee must learn to cooperate, endure dangerous drills, and prepare for the next invasion. Kizuna arrives with little combat ability and an HHG power that is too weak to make him stand out, but his place at the school soon becomes unusual for another reason: his sister believes erotic experiences with him can restore the girls’ energy or strengthen their power. Around him, large-breasted girls in skimpy pilot outfits move between training, missions, and awkward intimacy, turning the academy into a place where combat and desire are inseparable. As Kizuna struggles with embarrassment, pressure, and growing responsibility, he has to find a way to become useful in a world where survival depends on both martial skill and the unstable bonds between the students.