Everyone in the village has been able to regain their memories, but a few villagers were too rash and attacked the treehouse. Luckily, he stopped them before they could harm the rest of the village. The villagers have learned that they can only change their memories once. They've asked him to come up with a way to restore everyone's memories to their former state within a month or else they'll destroy the entire village. He doesn't want the current conflict to last too long. He'll continue his experiments.