"Days / GREEN" is the 24th single released by Hamasaki Ayumi. The single featured the two A-sides, as well as re-recorded songs of Ayumi's LOVE ~Destiny~ and TO BE. "Days / GREEN" and "GREEN / Days" differ only in the track order and which of the re-recordings they have as their B-side. The DVD for each contained both music videos, but only the making video for the A-side that came first in the name ("Days / GREEN has the "Days" making PV). Each came in CD-only and CD+DVD versions, each with slightly different covers. The first pressing Editions of the CD+DVD editions were vertically long, similar to Mirrorcle World. "Days / GREEN" was Hamasaki's 19th consecutive single to reach #1 on the Oricon charts, and 31st overall.
