Ichika Orimura is the only male ever found able to pilot an Infinite Stratos, a powered combat exosuit that only women were thought to control. Enrolled at the all-female IS Academy under his own sister Chifuyu as an instructor, he trains alongside pilots Houki Shinonono, Cecilia Alcott, Charlotte Dunois, and Lingyin Huang, whose rivalry over him complicates every lesson. This manga is the first of two separate adaptations of the original light novel.