Mahiro, the Prince of Mismarca Kingdom, is idle and lacks interest in martial training or academics. Instead, he spends his nights engaged in trivial pleasures, which constantly earns him scolding from his Imperial Bodyguard, Pariel. The Demonic Kingdom of Granmarsenal dispatches a powerful squad, led by the warrior princess Lunas, to attack Mismarca Kingdom. The vassals of Mismarca Kingdom are eager to go to war, but a meek individual suggests negotiating instead. What will happen to Mismarca Kingdom and its seemingly unimportant Prince, Mahiro?
