Sudachi no Maoujou

After the hero defeated the demon lord, the world is finally at peace... leaving the young Villager of Beginnerville in a bind! Without a demon lord to defeat, people have no need for potions and items...leaving Villager's item shop, The Nest, empty and lifeless. At this rate, Villager might have to close The Nest...! But then suddenly a mysterious girl appears and everything changes...

(Source: Kodansha)