For those of you who don't know; Casteshipping is the official title for the pairing of Theif King Bakura and Pharoah Atemu. The more commonly searched title for this pairing is Darkshipping, though in official terms that relates to the two of them via modern day, not ancient egypt.
I referenced the poses from the cover of a doujinshi by the name of Minakagami No Gengetsu 2. (Or so I believe that is the name of the comic, considering my translation skills are rather rusty....) It was a bit tricky considering that the doujinshi was posed for Seto and Atemu, but I felt like changing it around into a Casteshipping pair, rather than a Scandalshipping pair. <.<
The coloring was added via an online program I happen to use frequently with some of the my other arts. I wasn't as rushed with this one, so I find that the coloring actually seems appropriate for the image. Atemu's cape could use some work though......