The song was released on May 8, 2013, as the debut single of Hikasa from Pony Canyon, and is best remembered for its use as the first ending theme for the first season of Attack on Titan.

The singer Yoko Hikasa had previous experience in voice acting and singing since first working on the April 2009 anime K-On!, but declined offers to debut as an artist.

[3][4][5] At the production press conference for Attack on Titan on December 8, 2012, Hikasa announced that she would sing the first ending theme for the anime.

[6] The director of Attack on Titan Tetsurō Araki reportedly supervised the creation of the lyrics to ensure the song matched the theme the show was going for.

The music video was choreographed to reflect the feelings of Eren Yeager, the main character of the anime, and his desire for freedom.