<P> Attack on Titan is an anime series adapted from the manga of the same title by Hajime Isayama . It is set in a world where humanity lives inside cities surrounded by enormous walls due to the Titans, gigantic humanoid beings who devour humans seemingly without reason . The story follows the adventures of Eren Yeager, his adopted sister Mikasa Ackerman, and their friend Armin Arlert, whose lives are changed forever after a Colossal Titan breaches the wall of their home town . Vowing revenge and to reclaim the world from the Titans, Eren and his friends join the Scout Regiment, an elite group of soldiers who fight Titans . </P> <P> Produced by IG Port's Wit Studio and directed by Tetsurō Araki, Attack on Titan was broadcast on the Mainichi Broadcasting System from April 7 to September 29, 2013, and later aired on Tokyo MX, FBS, TOS, HTB, TVA and BS11 . Both Funimation and Crunchyroll have streamed the series with subtitles on their respective websites . Funimation has also licensed the anime for home video release in 2014 . Episode 1 of the English version premiered at Anime Boston, with other episodes put on Funimation's subscription services . On television of the series has broadcast weekly on Adult Swim's Toonami block on May 3, 2014, starting at 11: 30 p.m. EST . </P> <P> From episode 1 to 13, the anime's opening theme song is "Feuerroter Pfeil und Bogen" (紅蓮 の 弓矢, Guren no Yumiya, lit . "Crimson Bow and Arrow") by Linked Horizon and the ending theme song is "Utsukushiki Zankoku na Sekai" (美しき 残酷 な 世界, lit . "A Beautiful Cruel World") by Yōko Hikasa . From episode 14 to 25, the anime's opening theme song is "Die Flügel der Freiheit" (自由 の 翼, Jiyū no Tsubasa, lit . "The Wings of Freedom") by Linked Horizon and the ending theme song is "great escape" by Cinema Staff . The opening themes were collected on Linked Horizon's single "Jiyū e no Shingeki" which sold over 100 thousand copies in its first week of sales . </P> <P> A second season aired from April 1 to June 17, 2017 on MBS and other television networks . Funimation and Crunchyroll streamed the second season on their respective websites, while Adult Swim aired a dubbed version . The opening theme song is "Opfert eure Herzen!" (心臓 を 捧げよ!, Shinzō o Sasageyo!, lit . "Dedicate Your Hearts!") by Linked Horizon and the ending theme song is "Yūgure no Tori" (夕暮れ の 鳥) by Shinsei Kamattechan . </P>

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