- Published by Studio e.go! in Japan on 2004 January 29. Rated 18+ (advisory, CERO-18)
- Published by GN Software in Japan on 2005 February 3. Rated 18+ and D.
The original PS2 version released in 2005 was rated 18+ (advisory). The 2007 repackaged edition whose contents is completely identical to the old version was reexamined under the new ratings system and received a rating of D.
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