This CD contains both opening and ending themes for the PlayStation2 game, "ARIA the Natural ~tooi yume no Mirage~." There's no connection between other ARIA music and this CD, so it's probably best to think of this CD as KAORI CD instead of ARIA CD. If you're familiar with KAORI's other songs, you can consider this one to be closer to those. I don't think these are particularly great, but they're not bad, and KAORI sings them well, as usual.
Back of the CD has a cute picture of KAORI, so I scanned it, in addition to the front image.