Discuss about anything related to the Twelve Kingdoms, also known as 十二国記, Juuni Kokki or Jūni Kokuki. Talk about the novels, the anime, the writer Fuyumi Ono or illustrator Akihiro Yamada, but beware for spoilers!
Not really at all similar, but I'm going to recommend Natsume Yuujinchou and it's second series followup Zoku Natsume Yuujinchou. It has a vaguely similar protagonist, some touching fantasy elements, and I generally think it should probably appeal to just about anyone who likes 12k.