Trivia: The anime TV series, originally scheduled to debut on Japanese television in October 2001, was delayed in respect for the September 11, 2001 terrorist attacks in the United States. The Japanese release of an anime TV series about teenagers fighting international terrorists was considered tactless so soon after the attacks against the U.S. by international terrorists. It was released January 8, 2002, three months after its originally announced premier date.
Other mistake: When Sousuke checks Kanami out at the train station, the newspaper has its peephole on a different spot on the page depending on the shot. (00:07:25)