You have to follow the main story to exit the village to the east. The main steps are:
1) Defeat Kaali the lioness
2) Accept the Sly Fox quest from the quest board in Blackforest village
3) Find the hidden village and solve all quests there
4) Accept the final quest from the hidden village
5) Get the box from Father Fox and deliver it back to the hidden village
6) Pick a side and then return to Blackforest village to be able to exit the village for good