Mahiro, the prince of Mismarca Kingdom, shirks his duties and spurns the way of the sword, opting for late-night revelry over study. His diligent Imperial Bodyguard, Pariel, constantly rebukes his idleness. Meanwhile, a formidable elite team from the Demonic Kingdom Granmarsenal, led by the warrior princess Lunas, approaches Mismarca. As tensions escalate and calls for war echo throughout the kingdom, one voice suggests diplomacy over conflict. What lies in store for Mismarca Kingdom and its seemingly inept prince, Mahiro, amidst impending turmoil?