This was from a study I drew for the postcard series my former company was commissioned to work on. The theme was "fresh" and I thought children and flowers would be perfect. The clients preferred the other studies our team came up with, including my other concept, but I liked this illustration so much that I polished up my drawing and re-colored it. You can view my original sketch and a couple of work-in-progress caps here.
Reference taken from gettyimages.com and sxc.hu for the kid's pose and and for the cherry blossoms.
