Last year, Square Enix revealed a new sequel for “Gunslinger Stratos″!  Yesterday, we shared a new Gunslinger Stratos 2 CGI trailer showing off the game, which is only released for arcades in Japan. Today, we’re taking a closer look at the music promotion video which takes us behind the scenes of the music production. In the video, you can see how live recordings are done and listen to how they sound. The video also has gameplay clips!