Yes, they made a second season.
Kuroshitsuji (Black Butler)
So far, there is two. There probably will be a third influenced by Kuroshitsuji II's new main characters.
It is and it's not. They don't really get together but they touch a lot in the series.
Kuroshitsuji was created by Yana Toboso.
Kuroshitsuji was originally a manga.
In the first Kuroshitsuji Musical there are 7 songs. In the second Kuroshitsuji Musical there are 15 songs.
The opening theme song to the anime series Black Butler 2 is "SHIVER" by the GazettE .
There is no main character from Kuroshitsuji named Claudia. There is only Claude Faustus, who is one of the main characters in Kuroshitsuji II.
Unanswerred questions about kuroshitsuji can be found at the link at the bottom.
Kuroshitsuji is its own show and Drocell is a character in the show.
If they are a fan of Kuroshitsuji, I would recommend Hellsing.
it is unlikly that there will be a 3rd season off kuroshitsuji