It was released via Sony Music Japan on October 27, 2010, and was distributed in two formats: a CD-only standard version and a CD+DVD limited edition.

Commercially, Star peaked at number three on the Oricon Albums Chart and had first week sales of 92,962 copies, a somewhat lower figure compared to her previous records.

It went on to sell 155,457 copies within a month upon its release and was certified gold by the Recording Industry Association of Japan (RIAJ).

Along with the B-side track "No Answer," the release exhibits a bright pop sound with oriental string-based instrumentations.

Three of the versions are limited edition releases, with each containing a different T-shirt sporting the message: "Wake Up, Travelling Circus is Coming," in different colors.