You were a human and were friends with monsters even before the war between monsters and humans began. You and Fell, aka the skelt monster, were best friends, but... then the war began. After about 2 weeks of war, people drove the monsters into the cave and seven magicians used their souls and sealed the entrance to the Dungeon with a barrier. . .

...Several years passed, you always tried to escape from the village to Mount Abbot but you were always caught and sent back. One night you escaped and managed to make your way to the mountain. You entered some cave and looked around.