Your All Free

According to my mother on a mountain, my ancestors sealed the monsters in the underground. And since then everyone feared to go near that mountain. As years goes on many humans lost the ability to used magic. But not my family since we are the strongest casters/sorcerers. Since we are the only family that has magic in their blood people feared us and spread rumors about us. My family is always the main target to be tortured since we never fight back. But then my sister, Chara, got fed up that she kill a village boy due to being bullied. The villagers chase her up the mountain. Chara is the only one in the family who doesn't have magic in her blood. That's the last day I saw Chara. Then a monster got out of the underground carrying a child the villagers hurt the monster. The monster is on the verge of death I help him by teleporting him near the hole and the monster fell. My mother died in my place. Now I am 18 and I have a brother to take care of, Frisk, a non-caster. Then next we are falling...down.