The
publisher's website says "SRIN-1031～1035 - CDx2, DVDx2, CD-Romx1"
Disc 1 should be an OST, disc 2 an arrange disc, dvd 1 is Night Striker superplay, dvd 2 should be Syvalion superplay, and the CD-rom could contain a sort of "making-of, history of.." or something like this.