Excuse me if I spelled it wrong, but I was wondering about the legality of fan made manga based on official tv shows and mangas that portray the characters in sexual situations (normally homosexual). I was reading about fanfiction including this type in Wikipedia, and read that there are a fair number of underground doujinshi books in Japan. Do people ever get charged for it there? Is there some kind of mutual understanding in Japan about not sueing for copyright when it comes to Doujinshis?