In a world of technological progress, females are the only ones who can pilot the most advanced military unit in history--the Infinite Stratos (IS). With this power, women have seized complete control of all political, social, and economic ventures; leaving men to the fringes of society, made to tend to the whims of their now, female overlords. That is until Orimura Ichika, the sole male found to have IS piloting ability, is thrust into the spotlight, and enrolled at the prestigious IS Academy. Stuck in the middle of a female-dominated population, Ichika sets out to prove men still have a place in this world. Little did he know, he is just the thing these women have been looking for.

“Ufufu. And YOU shall be my attendant.” Iris, the seventh princess of Luxembourg, has arrived at IS Academy—and taken Ichika as her servant. Ling is less than pleased, and when Iris proposes eloping back to her country, she challenges her to an IS match to put a stop to it. But even teamed up with Houki, the two can’t keep up with her fourth-generation IS... And if that isn’t bad enough, the changes Houki’s been going through prompt a previously unknown squad of mass-produced IS to kidnap her! Ichika and the other cadets are thrust into the battle that will later be known as the Akatsubaki Incident. Chaos swirls around the red camellia in the twelfth installment of Infinite Stratos!

The time for the summer class trip to the sea is near, and the fight for Ichika's heart is as hot as the July weather. The girls will stop at nothing to corner him for their own, and when the swimsuits come out, it may just be checkmate! With the arrival of Shinonono "The Genius" Tabane comes a huge surprise, and just the thing Houki needs to even the playing field. But it's not all fun in the sun when a military IS goes on a rampage, causing Ichika and the cadets to spring into action. Will our dear cast come to learn the meaning of true inner strength? Find out in this installment of IS, the high-speed school action romantic comedy!

In the aftermath of the Golem III attack, Kanzashi confesses her love to Ichika, while Houki and the others watch like hawks to make sure that he's not too interested in return. Meanwhile, with the school still heavily damaged, and a desperate need to repair Byakushiki, Ichika visits its manufacturer, Kuramochi Engineering... And while he's gone, a shadowy plot seizes its chance to strike IS Academy. What is the Kurokagi, and its World Purge ability? How far will the girls go to catch Ichika's heart? The high-speed school battle romantic comedy charges forth in an eighth volume!

 “Please! Take care of my sister!” Ichika doesn't know what to do about Tatenashi's sudden request, but what he can do is take on the semifinals of the all-years tag-team tournament alongside her little sister, Tatenashi Kanzashi. What he can't, or at least doesn't want to do, is explain why he's on a date with someone the other girls don't know of. Will Kanzashi end up with him? Will Tatenashi and Houki stomp their way to a victory? The sparks of love fly between two sisters in the seventh volume of a high-speed school battle romantic comedy!

Ichika is just beginning to settle in as the world's only male IS cadet when two new classmates arrive: the dashing French scion Charles and German soldier Laura. Will he discover Charles's secret? Why does Laura, who he's never met, hold a grudge?

It's August, and it's summer vacation! Passions run as hot as the sweltering weather as we follow each girl through their own summer love story. Will their dreams of making summer memories with Ichika come true? Who'll be the last one left standing beside him in the sun? Find out in the fourth volume of an emotionally-packed high-speed school action romantic comedy! There may not be any IS battles, but the battlefield of summer love is heating up!