I thought the image was quite mysterious and so I wonder what anime or manga is this image from?
It's 'Hitsuji no Uta' or 'Song of the Sheep' in English.
It's a story about a boy named Kazuna who had 'Blood Craving Disease' or just 'Vampiric'XD
More info please read it here; Lament of the Lamb

It's too late or too early for Valentine but maybe this suite the Halloween atmosphere....^^

Credits goes to:
Image: [X]
Fonts: Too much fonts...but the script-like fonts in from Dafont.com, it's Jellyka or something. And the other can be found in searchfreefonts.com
Brush: It's splatter brush, from Hawksmont Universe.

Dedicated to ShiningHime!!!! XD