Suppose a Kid from the Last Dungeon Boonies Moved to a Starter Town, Vol. 9 (light novel) - Toshio Satou - Bog

DECEPTION AND TRICKS GALORE! With a drop of confidence in his blood, Lloyd is called to participate in a Military Festival as the class representative from his cohort of cadets. But things involving Lloyd never seem to go as planned... This time, a national treasure on loan from the neighboring Profen Kingdom goes missing during the event! The culprit? The great thief Zalko, it would appear! At almost exactly the same time, the king of Azami goes missing, and the cadets gather together for a covert mission to handle this emergency. If they fail to do so quickly, this might become a serious diplomatic issue...