Suppose a Kid from the Last Dungeon Boonies Moved to a Starter Town, Vol. 4 (light novel)

"Lloyd's exploits have drawn the ire of a second-year student named Micona, who challenges him to a little competition to prove which of them is better! And what better venue for Micona to throw down and put Lloyd in his place than the starter dungeon, which, due to some suspicious activity, needs to be investigated anyway? When the dungeon starts pumping out high-level dragons, though, just surviving may be more than they can manage! As Micona searches for better ways to crush her competition, a shadowy figure approaches her, offering forbidden tactics...from Kunlun."--Publisher's description.

Nao Watanuki, Toshio Satou