GRIEVA (グリーヴァ)'s first mini-album that contained 1 previously unreleased (well, fully released, that is) song, an SE, and then 5 remakes of previously released songs, most of which are rare or hard-to-get.

The track list of this mini-album was not revealed until after it had been released, and on the band's website the songs are still all listed as 「×××××」