What kind of idiot kids would go into a dangerous place (the forest) for some random promise of adventure and treasure? Oh wait, I was an idiot kid like that.
So like why would you even attempt to harm the most powerful person's daughter in your village? I can see that high school literature was not a strong suit of this writer. I was curious about the manga but 15CH and still no real farming or coherent interesting plot so dropping it.
Wait a minute... even after learning of what she goes trough when alone, he still went to this "treasure hunting". Well he's obsessed with farming so what else can we expect.