MIYA records does heaps of bootlegs of Japanese soundtracks, anime soundtracks and albums of musicians. Also beware of Son May CDs as they're bootleggers too (makes it difficult when you have SM records that's a legitimate company though!)
My current copy of MY STORY is a MIYA records version so I use it in the car now so I don't mind if it's stolen!
The copies are generally very good/close to the original, with really thick pages for the booklets. I've never had any playback issues with them as all copy protection is obviously removed
Unfortunately because they're pretty good copies it's hard to tell the difference. Ayumi is contracted with Avex and Avex only.