Ep. 17: Autumn arrives at Academy City as characters shift to winter attire and new living arrangements begin.
Aired on February 4, 2011

With autumn settling over Academy City, students don winter uniforms while Accelerator, Last Order, and Kikyou Yoshikawa relocate to Aiho Yomikawa's apartment. Misaka 10032 and three other Sisters start rehabilitation in the city. Mikoto forces Touma to fulfill a bet by visiting a shop offering a Gekota phone strap for couples plans. They must pose as a loving pair, but Kuroko interrupts the photo out of jealousy. Meanwhile, Last Order gets locked out of the apartment, prompting Misaka 10032 to mock her. Feeling jealous for lacking goggles like other clones, Last Order steals Misaka 10032's goggles and runs away, causing friction between the two.
Episodes
- Ep. 13 · Oriana battles Touma while Lidvia attempts to activate the Apostolic Cross from outside the city.
- Ep. 14 · Touma and Index travel to Chioggia, Italy, where they encounter Orsola and face assassination attempts.
- Ep. 15 · Touma and allies rescue captured friends from the Queen's Fleet commanded by Bishop Biagio.
- Ep. 16 · Touma defeats Biagio to stop the Queen Fleet's self-destruction spell in London.
- Ep. 17 · Autumn arrives at Academy City as characters shift to winter attire and new living arrangements begin.
- Ep. 18 · Characters navigate daily life and search for Last Order in London and Academy City.
- Ep. 19 · Amata Kihara investigates the consequences of Gabriel's possession in Russia.
- Ep. 20 · Accelerator evades capture while Touma and Last Order face Vento's deadly attacks.
- Ep. 21 · Testament device summoned by Aleister to target magic users while Touma confronts Vento