Shy Boy is the third extended play (first Japanese release) by South Korean girl group Secret.

On November 22, 2011, it was announced that a Christmas Edition of the album will be released to music stores on December 7, 2011.

The album cover is themed after Christmas, with Secret wearing clothing resembling Santa Claus.

To promote the album, Secret appeared on a Japanese variety show, Made in BS Japan on October 12, 2011.

Also, Secret had a Shy Boy Album Release Party at the BRITZ at Akasaka on November 16, 2011.