Amagami SS may have been mediocre, but it had a great singer for its openings. She was called azusa and soon became one of my favorite Japanese artists (not that I know about too many though).
So far, she has only sung the openings for Amagami SS (and soon the second season), her debut, and Moshidora and also the ending for Astarotte no Omocha! She has a couple of singles besides all this, but is a fairly new artist who has only been around for a year. Before going for a solo career, she was in a group called Sparkling Point.
From the very second I heard her voice I fell in love with it. I do not know any musical terms for her music, but it is very catchy and her voice very soothing. It is a great combination. It falls under the pop category, which is fine by me.
Even if all the anime she has sung for are mediocre, her music makes me remember them. Amagami SS and Moshidora may not have been too special, but when I think back I remember happy thoughts. It is as if azusa makes any anime good in memory. I can only imagine her music in a good show. It would be lovely.
Here are some songs:
i Love by azusa. Her debut. Amagami SS Opening 1.
Yume Note by azusa. Moshidora Opening.
Precious Time by azusa.