I played the demo distributed on the site awhile back and totally loved it.
There's this one violin track that goes off when you first meet Sue. If you hear it, I'm sure you'll understand why it just sets my heart all a flutter! The techno beats are fun too. Get a load of the full battle track if you can, okay? The guitar riffs coupled with the baby noises(?) make for such a fun, yet cutely serious effect!
Links:
http://www.spike-chunsoft.co.jp/conception/)
-> It's under "special". It's all in Japanese, but it's the same deal for western demo downloads. Obviously, you need a PSP to play it!