Amazon.co.jp - If you like Pretty Rhythm you should consider buying this, it's amazing.
DDL (temporary, probably won't last).
This contains pretty much all Pretty Rhythm music ever, including stuff that has never been on any of the CDs before.
You get 283 tracks, 10:28:18 in duration spread over 10 CDs.
MP3 VBRv0, didn't bother romanizing titles, but did add artists to the latter 5 CDs.
Resized cover art in every folder, full 600dpi scans only in the FLAC torrent or here.
There's too many interesting things on here to list, so you'll just have to figure it out yourself.
CD contents:
01. Aurora Dream original soundtrack part 1
02. Aurora Dream original soundtrack part 2
03. Dear My Future original soundtrack
04. Rainbow Live original soundtrack part 1
05. Rainbow Live original soundtrack part 2
06. Aurora Dream OP/EDs and insert songs
07. Dear My Future OP/EDs and insert songs
08. Rainbow Live insert songs
09. Rainbow Live OP/EDs, Prism Live Solos, remainder of the OST and "You May Dream 〜Mission Successful Mix 2014〜"
10. Special Disc with Over The Rainbow, Game music, Akai Meganee & Meganii duet and other stuff