Holy Garden is fifth doujin album by PolyphonicBranch. It was released at THE VOC@LOID M@STER 13. Most of the tracks are sung by Miku, but Luka, Rin and Len are also featured. The album's official page is located at PolyphonicBranch's website and the crossfade can be seen on Niconico It can be purchased through Amazon.