Attack on Titan: No Regrets

Attack on Titan: No Regrets (進撃の巨人 悔いなき選択) is a Japanese manga series written by Gun Snark and illustrated by Hikaru Suruga, based on a visual novel of the same name. The series is a prequel spin-off of Hajime Isayama's popular Attack on Titan (進撃の巨人) manga. The story follows the character of Levi Ackerman before he joins the Survey Corps.

The series is published by Kodansha in Japan and by Kodansha USA in the North America. A two-part original animation DVD was released in 2014 and 2015.

Plot
The story is a prequel to Attack on Titan that follows Levi during his days as a criminal in the underground city, when he was with his two best friends Isabel Magnolia and Farlan Church before Erwin Smith recruits him into the Survey Corps.

Conception and development
Before Suruga began the manga, her editor-in-chief suggested that she visit the Metropolitan Area Outer Underground Discharge Channel so she could better visualize the Underground where Levi and the others live at the beginning of the story. It was while there that Suruga was first able to picture how large an 18-meter tall Titan actually would be.

While drawing Levi, Suruga attempted to make him appear younger than he does in Attack on Titan. She noted that his lack of emotiveness made it difficult to choose which expressions to give him while drawing. With Isabel, Suruga attempted to convey a "lively, energetic" character who, while "very cute", was just as capable at fighting Titans as anyone else. Suruga had difficulty drawing Farlan's face, as she wanted to give him characteristics that would clearly distinguish him from the other two main characters. Despite that, she found it surprisingly easy to copy the character's hairstyle from Namaniku ATK's original design.

Visual novel
Two visual novels written by Gun Snark (砂阿久雁) of Nitroplus, titled "A Choice With No Regrets: Preview" (悔いなき選択[予告]) and "A Choice With No Regrets" (悔いなき選択), were released with the third and sixth Blu-ray sets of the Attack on Titan anime, on September 18, 2013, and December 18, 2013, respectively. The character designs were provided by Namaniku ATK, also of Nitroplus.

Manga
The series was written by Gun Snark and illustrated by Hikaru Suruga (駿河ヒカル). A prologue chapter was published in the November 2013 issue of Kodansha's magazine Aria on September 28, 2013. The prologue was republished in the December issue on October 28, 2013, after the first issue to contain it quickly sold out. The series regular began in the January 2014 issue on November 28, 2013. Kodansha made the decision to increase the magazine's print run 5-fold (500%) due to the series' popularity, starting with the January 2014 issue. When they reprinted the issue on December 16, 2013, they increased the number of copies again, making the total print run a 10-fold (1000%) increase over the previously recorded monthly sales of 13,667 copies. A special chapter was published in the May 2014 issue of Kodansha's Monthly Shōnen Sirius magazine on March 25, 2014. The series ended in the August 2014 issue on June 28, 2014.

After the first volume was released, the decision to reprint it came on the same day. A booklet containing a set of character sketches and the prologue chapter was bundled with a special edition of the volume. A complete color edition containing the entire series would be released on December 5, 2017. Kodansha USA announced their license to the series at their New York Comic Con panel on October 11, 2013.

Anime
A two-episode original animation DVD adaptation was announced in the 14th volume of Attack on Titan. The OADs were produced by the same staff that produced the Attack on Titan television series. The episodes were directed by Tetsurō Araki and written by Yasuko Kobayashi, with animation by Wit Studio. Character designs were provided by Kyoji Asano. The insert song is "So ist es immer" (Just Like it Always is) by Hiroyuki Sawano. The OADs starred Hiroshi Kamiya as Levi, Daisuke Ono as Erwin, Kōji Yusa as Furlan, and Mariya Ise as Isabel. The first episode was included with the 15th volume of Attack on Titan on December 9, 2014, and the second episode was included with the 16th volume on April 9, 2015.

On January 15, 2016, Kodansha Comics announced that they would release the two episodes with the special editions of the 18th and 19th English volumes of the manga, on April 5, 2016 and August 2, 2016, respectively. On December 15, 2021, it was announced that Attack on Titan's OADs would be released subtitled by Funimation and Crunchyroll on December 19, with the dubbed release following in 2022. On May 2, 2022, it was announced that the dub will be released weekly starting on May 8, 2022. The No Regrets OADs were released from May 29 to June 5.

Reception
The manga has over 1.5 million copies in print in Japan. The first volume of the manga had 500,000 copies in print by April 2014, having sold 140,186 copies within the first five days of its release. The volume was also the 57th best-selling manga volume in Japan in 2014. The first volume of the English translation appeared on the New York Times Manga Best Sellers list for 18 nonconsecutive weeks, while the second volume was on the list for 12 weeks.

Reviewing the first volume for The Fandom Post, Kate O’Neil gave it a grade of B. Noting Levi's status as a fan-favorite character, she wrote: "I often wonder at how much of the backstory in these spin-offs was the result of the original author's notes or the spin-off writer responding to the desires of the fanbase." She also commented that the art is "handled by someone other than the author, which means that characters are actually well proportioned and the perspective is solid."