Infinite Stratos 2 is a Japanese light novel series written by Izuru Yumizuru and illustrated by Okiura. It is the sequel to the original Infinite Stratos light novel series, and follows Ichika Orimura, who is the only male capable of piloting an "Infinite Stratos" (IS) power armor. With the introduction of new IS pilots, Ichika must face new challenges both in his personal and military life. The story also focuses on his relationships with the other female IS pilots as they compete for his affections.