Magic comprises six disciplines: the four elements plus light and darkness. Fire mages join the army, wind the air force, water the navy, and Earth the Forbidden Army. While light become medics, dark abilities are varied. Kazuya uses his magic to possess a doll called Little Musashibo. Little Musashibo joins adventurers mapping tunnels beneath the city. They encounter a salamander that forces them to flee, with Little Musashibo saving one adventurer, Yuno, who develops a crush on him...