Here's a page of character and voice actor pics for Kin-iro no Corda (La Corda D'Oro) ~Primo Passo~. This is an adaptation from a girls' dating game, but it is more than just a reverse harem anime -- although it is certainly that. The heroine is wonderful, the guys are individuals, the relationships are interesting, and the emotions are enjoyable. And there is good music as well, for those of us who like classical music. The setting in the music world is great.
Takagi Reiko does a fantastic job as the heroine, Hino. She had a minor role in Love Hina (Kaolla Su) and a somewhat bigger role in Bokusatsu Tenshi Dokuro-chan (Sakura), but is not a big name at all. Among the guys, however, there are several big names, including Taniyama Kishou (who was Ken in Lamune), Morita Masakazu (Ichigo in Bleach), and Fukuyama Jun (Lelouch in Code Geass).