2011 Infinite StratosSeason 18bit
First episode: 2011-01-07Last episode: 2011-04-01
Episodes
0h 24m

Ichika Orimura is attending the Infinite Stratos Academy as he is the first male to ever pilot an IS where he becomes a sensation among the all female students of the academy. With his homeroom teacher being his older sister Chifuyu, an ex-IS pilot, Ichika is in unease and unprepared and trying to get use to the academy. Later he learns his dorm roommate is his childhood friend, kendo champion Houki Sinonono, who he has not seen in six years

0h 24m

Ichika is told by Chifuyu that he will be provided with his own personal IS for his match against Cecilia, a rarity since there are only 467 IS Cores that were created by Tabane Shinonono, Houki's older sister before she disappeared. To prepare himself, Houki agrees to train Ichika by practicing Kendo. On the day of the match, Ichika is given the IS Byakushiki against Cecilia's IS, Blue Tears

0h 24m

Cecilia takes a liking with Ichika and gives the position of class representative to him instead much to Houki's chargin. The next day, Ichika meets Lingyin, the new transfer student from China who also happens to be his childhood friend and also the class representative of her class. After Ichika and Lingyin get reacquainted with each other, Cecilia and Houki get jealous and coached Ichika in IS practice very hard

0h 24m

Ichika and Lingyin battle in the Inter-Class IS Tournament but their match is interrupted when a mysterious IS attacks the arena. As Ichika and Lingyin hold off the IS so the audience can escape, they soon realize the IS is an unmanned drone due to it's machine-like behavior. Together with Cecilia, the three of them manage to defeat the IS but not before it injures Ichika

0h 24m

Houki has been given her own room by Maya and leaves in anger when Ichika is being dense about it but makes him promise to go out with her should she win the grade level individuals tournament, which spreads into a rumor that the winner of the tournament gets a date with Ichika. At the same time, a transfer student, another male IS pilot from France named Charles Dunois, arrives much to the joy of the girls of the Academy due to Charles's Bishōnen looks and "interest" with Ichika, who also becomes his new roommate. While Ichika's class has IS practice with Lingyin's class, Chifuyu has Lingyin and Cecilia battle against Maya in a Rafale Revive IS, a 2nd generation IS made by Charles' father's corporation, which Maya easily defeats Lingyin and Cecilia's more advanced ISs

0h 24m

After losing against him in a practice bout, Ichika has a training session with Charles, which is interrupted by Laura who wants to fight him, but refuses. On his way back, he spots Laura talking with Chifuyu, begging her to return to Germany and that the IS Academy doesn't deserve her, but the latter doesn't listen. It is revealed when Ichika was kidnapped during the 2nd Mondo Grosso IS championship, Chifuyu forfeit the finals in order to rescue him

0h 24m

Houki becomes pressured to win the upcoming inter-class tournament after her attempt to ask Ichika out escalated into a rumor that whoever wins the tournament gets to date him. As Cecilia and Lingyin prepare to spar, Laura appears and goads them into a two-on-one battle, effortlessly countering all their attacks. When she continues to beat them at the risk of their lives, Ichika and Charles step in to rescue them before Chifuyu puts a stop to the battle, declaring it will be settled in the inter-class tournament

0h 24m

The match between Ichika and Charles against Laura and Houki begins where Laura focuses on fighting Ichika and pays no heed to her partner Houki, who is soon knocked out by Charles. Ichika and Charles uses their teamwork to take advantage of Laura's AIC shield to defeat her despite Ichika's shields running low after using Yukihira. With her defeat imminent, Laura reminisce her past of being a failed genetically engineered soldier unable to adapt an IS until meeting her teacher and role model Chifuyu but hates Ichika upon learning Chifuyu shows her softer side because of him

0h 24m

Houki calls her sister, Tabane, who reveals she has completed an IS called Akatsubaki just for her. After being hassled in the morning by Laura, Ichika goes with Charlotte to the mall to buy swimsuits for their beach study session while Lingyin, Cecelia and Laura stalks them. When Charlotte notices them following her, she hides with Ichika in the dressing room to show off her swimsuit, but they are both discovered by Chifuyu and Maya

0h 24m

After catching the girls listening at their room while Ichika is massaging her, Chifuyu has a talk with the girls about their feelings for her brother and gives them some advice. The next day, Tabane arrives to personally deliver to Houki the Akatsubaki, a fourth generation model with abilities far more advanced than the others. However, Chifuyu soon receives news that an an unmanned IS called the Silver Gospel has gone out of control

0h 24m

As Ichika and Houki begin their operation, the others notice how happy Houki looks, which prompts Chifuyu to tell Ichika to watch over her carefully. As Ichika and Houki engages in battle with the Silver Gospel and is about to corner it, Ichika notices an illegal fishing boat in the area and breaks off formation to protect it. Houki is angry at Ichika for ruining the plan but he scolds her for disregarding the boat's safety, which is something she never does

0h 24m

While the girls fight Silver Gospel, Ichika has a dream where he meets a young girl and a warrior woman who asks him if he wants strength, which he agrees as he wants to protect his comrades. As the battle continues to rage, Houki manages to cut one of Gospel's wings and sees it fall into the ocean, only for it to re-emerge in its Second Shift form with "angel wings" and proceeds to to take down Houki and the rest. Houki is soon awakened by Ichika, who is now in Byakushiki's Second Shift form, Byakushiki Setsura, and gives Houki a hair ribbon as a gift as he still remembers July 7th as her birthday