Written and produced by Yoshiki, it is the opening theme song of the first 12 episodes of the third season of the Attack on Titan anime series.

The television edit of the song was published on digital platforms on July 23, 2018, while the full single version was released on October 3, 2018.

[3] "Red Swan" was originally announced as an X Japan song, that would only feature Yoshiki and Sugizo, with Hyde on vocals.

[6] On September 15, Yoshiki revealed that "Red Swan" was actually completed just days earlier in Los Angeles.

[8][9] Michelle Minikhiem of J-Generation called "Red Swan" "grand in the way only songs written by Yoshiki can be," with a vocal performance that "absolutely aches with longing."

She described the track and its "swelling percussion, passionately romantic lyrics, and murmured philosophical questioning about life" as telling the story of a bittersweet love.