Don't know why I took this long to post this. My deepest apologies to the artist in regards to that. >.<"
So a little story-time behind the image: It's heavily based on Yuki's personality issues, and how he lived a good portion of his youth constantly ridiculed for being a hybrid of sorts. Much as tries to bottle most of his problems in, he can't hold it in forever, eventually driving him to lose his sanity.
This also serves as a means of "balancing" him out from all the mature/adult-rated images that he took part of. Hardly makes any sense, but I want to give him some character in any way possible (since he kinda represents me in some ways).