Blue Nathanael

From Choutomaraseru: An injured soldier on an alien world is rescued/captured by a soldier from the other side of the conflict. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A soldier from one side of the war is injured and the only survivor out of his troop mates. After he passes out, an enemy picks him up a treats his wounds, forming a bond with each other. After they separate, troop members from town see the soldier but when they reunite, the soldier's enemy/friend ambushes them. Will their friendship stop the fight?