Now this is the great sequel Black Butler II (or Kuroshitsuji II) it is set 1 year and 3 months after the end of the first season and has 2 new main characters Alois Trancy the master of the Trancy state and his demon butler Claude Faustus. Ciel was presumed dead at the end of the first series, but Sebastian had in fact never succeeded in taking Ciel's soul to begin with. Nonetheless Ciel has lost his memories including those about Madam Red's death, Grell, Soma and Agni, and Angela. With Ciel beileving he has yet to have his revenge Sebastian makes Ciel beileve it is Alois Trancy is the one that Ciel has to take his revenge upon. Now Black Butler II has a lot more violence and sadness but it's still the funniest anime I've ever seen the OVA episodes are the funniest. Here are the opening and closing songs.
Here are a few Black Butler tributes I did.