Okay well that took a lot longer than I was hoping.
TYCY-5626: original edition of Tokyo Majin Gakuen Kenpuuchou soundtrack (incomplete)
MACM-1117: later edition of Tokyo Majin Gakuen Kenpuuchou soundtrack with more tracks, possibly a complete soundtrack (I do not know for sure but it is at least more complete than the earlier one)
MACM-1051: drama CD for Tokyo Majin Gakuen Kenpuuchou, includes a few of the vocal tracks
MACM-1147: soundtrack for Tokyo Majin Gakuen Gehouchou (different game in the series)