Interesting, this album
http://vgmdb.net/album/12533 tell us by looking on the Obi that the Catalogue number is indeed efs- "0000" 4 zeros + counter example "1,2,3,4,5", now this album has only efs- "000" 3 zeros + counter. It makes me wonder if it was a typo and which one of them has the typo?