The Runebound by fuuryoku
"The two rarely spoke anymore, and never to each other. The glowing whorls and marks on their opposing arms bound them to each other so tightly that they were practically a single being. Feeling each other's thoughts and feelings as intensely as their own, they felt words seemed hollow since."
Painter, about 30 hours. Basically I had a sketch of the two figures sitting around when I came across an image of this great orange sunset. It solidified the color scheme in my mind, and that started the ball rolling.