かたわ少女 Katawa Shoujo

From the introduction:

There's snow falling. Gently, delicately, as if the world is trying to place each flake in exactly the right spot without disturbing any of the others. Hands in your pockets to keep them from the biting air. You feel it nip at your face as if in retaliation. Your gaze wanders. Barren trees dusted with white powder surround you on all sides. Your back rests against one of the sleeping ancients, indistinguishable from any of the others apart from a different shape to the branches. Birch? Maybe Cherry.