Suppose a Kid from the Last Dungeon Boonies Moved to a Starter Town, Vol. 8 (light novel) by Toshio Satou

Lloyd has come out of the hellish training session with the Demon Lord with an ounce of much-needed confidence. His next challenge is participating in the martial arts tournament for a chance to meet the Sacred Beast and to select the next leader of the Ascorbic Domain. The enemy forces have selected Allan as their vanguard, much to his chagrin. It’s a rematch between two “extraordinary” fighters, one with no real confidence in his abilities and the other with no real skills to speak of!