Ryuusei / Yakusoku

Ryuusei / Takusoku (流星 / 約束; Meteor / Promise) is the 14th single (16th overall) by Aoi Eir. It was released on June 13, 2018 with "Ryuusei" and "Yakusoku" as the single's lead tracks. It was release in three editions: a regular CD edition, a limited CD+DVD edition and a limited CD+DVD anime edition.

Single Informations
This single marks the end of the hiatus of Aoi Eir started on November 2016 after the release of her two best albums BEST -E- AND BEST -A-. The song "Ryuusei" was used as the opening of the anime Sword Art Online Alternative Gun Gale Online. The short version of the music video for the song "Yakusoku" was released on February 07, 2018.
 * Catalog Number: VVCL-1255 (Regular Edition), VVCL-1252~4 (Limited Edition), VVCL-1256~7 (Anime Edition)

Regular / Limited Edition

 * 1) "Ryuusei" (流星; Meteor)
 * 2) "Yakusoku" (約束; Promise)
 * 3) "Hitokakera no Yuuki" (ヒトカケラの勇気; A Piece of Courage)
 * 4) "Ryuusei -Instrumental-"

Anime Edition

 * 1) "Ryuusei" (流星; Meteor)
 * 2) "Yakusoku" (約束; Promise)
 * 3) "Hitokakera no Yuuki" (ヒトカケラの勇気; A Piece of Courage)
 * 4) "Ryuusei -TV size ver.-"

Limited Edition

 * 1) "Ryuusei" Music Video
 * 2) "Yakusoku" Music Video

Anime Edition

 * 1) "TV Anime Sword Art Online Alternative Gun Gale Online Non-Credit Opening Movie" (TVアニメ「ソードアート・オンラインオルタナティブガンゲイル・オンライン」ノンクレジットオープニングムービー)