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 Complete Production Limited Edition is a three-disc set consisting of two CDs ("Red" and "Blue") plus a Blu-ray. "Red" includes 14 anime and game tie-in tracks plus one new song. "Blue" includes 15 anime and game tie-in tracks plus one new song. The Blu-ray included with the Complete Production Limited Edition features LIVE & DOCUMENTARY "Shimayui Amami." Also includes a photobook (different design for each edition), liner notes, a set of four trading cards (different designs for each edition), and an original oversized T-shirt for BEST ALBUM "Hello, Unhappy."