The Aleph's Quest is the simplest main quest that can be completed. However, this main quest seems to be incomplete due to the lack of quests after be-friending/making enemies out of the Alephs. Note: I did it at 80(Enemy part) and the room was filled with Aleph's. After i left and tried to reenter, i couldnt just because my level. I dont know what level is max to keep entering that place, but 80 is too high :(