Despite possessing the Heart Hybrid Gear (HHG) ability, Hida Kizuna is not considered significant due to its weak power. His sister invites him to attend a strategic defense school, where busty female students use their HHG abilities to defend against extraterrestrial attacks while donning scanty pilot uniforms. Kizuna's fighting prowess pales in comparison, but his sister proposes an unconventional solution - intimate encounters that will recharge the girls' strength. It seems that Kizuna's future at this school is poised for humiliating encounters.
