Lazy Dungeon Master (Manga) Vol. 7 (manga)

Having soundly defeated the hero Wataru (albeit through a less-than-scrupulous method), Keima has saved Rokuko from being whisked away to the Imperial Capital. It isn’t too long though until another hero shows up on his doorstep…one that proves to be even more trouble than the last! But even Keima isn’t so lazy that he’ll ignore someone harassing his staff. It's time to take care of this nuisance once and for all--but how?