In a world where advanced robotic suits called "Infinite Stratos" granted incredible abilities, Orimura Ichika was the only male capable of piloting them. But what should have been a gift became a curse as he found himself surrounded by a harem of yandere admirers, each willing to do anything to make him theirs.
The harem was a mix of childhood friends, fellow pilots, and even his overprotective big sister, Chifuyu Orimura. Little did he know that their love would turn into a nightmare of obsession and confinement.