Strait Jacket (ストレイト・ジャケット Sutoreito Jaketto) is a 3-episode OVA series based on the light novel series by Ichirō Sakaki. It was released in 2007 in Japan. A film version of the OVA aired in the United States on the Sci-Fi channel.
Due to the awkward positioning of the end credits, Doug Erholtz and Brett Ericson are often listed online as also having voiced Gray. Similarly, the same happens with the Japanese credits, with 10 voice actors and actresses being assigned to Fahgo.