Hida Kizuna may have the HHG (Heart Hybrid Gear) ability, but his strength is not noteworthy. When his sister enrolls him in a defense school, he finds himself surrounded by students, mostly busty girls, who utilize their HHG powers to combat interdimensional foes in revealing pilot suits. Despite his lackluster combat skills, Kizuna's sister reveals a unique method for empowerment—intimate interactions with him can recharge the girls. Thus, his school days are bound to be filled with awkward and embarrassing moments.
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