Board Thread:Questions and Answers/@comment-199.119.29.66-20130918124829/@comment-6697950-20130918174633

Note: Anime is NOT the original. It was based on the novel that was written by Kawaha Reki - the anime is just an adaptation.

Anyway, as I said, the only thing you could be sued for is ripping off characters, story etc. Ideas and concepts are pretty much open to the public to adapt as it's the implementation of the idea, not the idea itself, that's a product.