The FIVE CDs were freely given to early purchasers well before the release of the game: http://harukaze-soft.com/nora/tokuten/soukiyoyaku.html
EDIT: Found the image containing ALL of the five CDs from an auction site:
The following is the poster regarding to this:
The following is a sample...
雪ノREN×HARU❀KAZE ボーカルCD (the No. 1 item in the following image)
Official site: http://harukaze-soft.com/event.html (no records in vgmdb yet)
It's sold as part of the "HARU❀KAZEグッズセットC89" goods set during C89, but can't be found anywhere.
Thanks! :D
Official site: http://www.h-comb.biz/product/12/page_sp/sp_pri.html (no records in vgmdb yet)
It is given to those who've preordered the game (i.e. not for sale) when they collect the game at launch.
Someone please share this CD (with the scans of the booklet), thanks.
vgmdb page: http://vgmdb.net/album/47805 (First released during C86)
Someone please share this CD (with the scans of the booklet), thanks.
P.S. It's already available on Share, but I don't have access to it: