ReoNa's first best album, bringing together outstanding anime and game tie-in songs from her debut through 2026! The two best albums, titled "Red" and "Blue," each include one new song! The "Red" CD includes 14 anime and game tie-in tracks plus one new song. The Blu-ray included with the First Press Limited Edition features live footage from "ReoNa ONE-MAN Concert Tour 2023 'HUMAN' at LINE CUBE SHIBUYA (2023/07/03)." Also includes a photobook (different design for each edition), liner notes, and a set of three trading cards (different designs for each edition).