It's a collaboration work with
She did the lineart and I painted it ))) Please visit her gallery, she's an amazing artist! *^______^*
Here you can find her lineart [link]
And here are a few words from Saimain about her characters:
"A portrayal of the former prince Luke and Julian (a vampire). The extent of Luke's madness requires that he be chained in his room to prevent him from hurting himself as well as others. Julian likes to drop by from time to time for the challenge of "taming" Luke...and Luke seems to have gotten hold of something sharp for this occasion. XD"