Everyone prepares for Fiesta des Lumiéres, which starts to bring bad memories for Filicia, whose comrades were killed in a fierce battle. While wandering in the battlefield with a heavily wounded arm, she falls into a tunnel which was well buried under the ruin of the past civilization, and finds a corpse of a soldier of the old era. In a delusion, the corpse approaches her and apologizes for the war they could not win while humanity is falling apart. Filicia was rescued from the tunnel by someone named Princess Iliya...