Where can I find the Adventurer?

Mia will provide you with a quest where you'll have to complete a task by the Adventurer. There isn't much information given out on how to complete this so you need to check your map. From your home, you should be able to find the Adventurer on the upper right side, just past the High Ridge.

Once you're inside, you can gather some Pine Wood. The Adventurer is in the middle of the land and you'll be tasked to get a Cigar from the Far Forest. Your reward in exchange will be a weapons box (there's a chance though that you won't get a weapon).

Far forest is located to the lower left area of your home. Be careful with your inventory space since the location is far, it will take a huge amount of time or energy to get there. Once you're in the Far Forest, the Cigar will be in a crate in the middle of the area.

Go back to the Adventurer in order to get your reward by exchanging the Cigar for the Weapons Box.