'Art of the Heart'

I had the urge to draw a graffiti-based picture and here it is. The big writing in the background says 'Art of the heart'.
The original characters in the drawing are characters me and my sister made together. Sister------>
The boy's name is Noir & the girl is Marianne. Yes, they are a couple. (I know they are standing abit too close, my fault -_-

The drawing was done using 0.2, 0.4 & 0.6 fineliners.
Thanks