Kamen Rider Fourze insert song Full version "Giant Step" by the Astronauts

I just remember Double Action Sword form Den-O when I heard this song,the duet is only the difference.Here's the full preview of the Insert/Battle theme of  Kamen Rider Fourze entitled  “Giant Step”  sing by  May'n and Yoshiharu Shiina the former vocalist of SURFACE in their new single unit the Astronauts.
By the way it is second of the best insert themes by a Kamen Rider series.

The album of Astronauts' “Giant Step” is also includes the Side-B song entitled “Endless Play,”  which is played and a theme song for Kamen Rider Climax Heroes Fourze. The album would be released this January 25.