The single was released in two editions: a first press/limited edition and a regular edition. The regular edition contains the B-sides "FANTASY", "Time to go home", and the instrumental for "Free". The first press/limited edition contains the music video for "Free". The album jacket covers for both versions are different.
The single reached number 1 on its first day on the Oricon charts and obtained the same spot in its first week. The song "Free" was used for the commercial promoting Subaru Stella and R2. The b-side song, "Fantasy", was used as the song in the commercial promoting music.jp.