"Perfect Garden～ロマンスニフレ～" (Perfect Garden ~Romance Touch~) is a compilation of various artists, with the main organizer Wonderful☆Opportunity. It comes with an 80 page doujinshi book featuring 6 artists, some notable ones being Zashiki Usagi, Iri, and SHARK. It consist of 6 tracks, both new and old, and was first distributed in VOC@LOID MASTER 16. It is available at Toranoana. A crossfade of the album can be heard here, and this is their official site.