It was just another day. The sky split open. Literally, the sky split. And from within, beings and beasts from another world crossed over. Thus, the peaceful times came to an end.

The world was filled with screams and weeping, and countless people died. The government sent the military, but even they were useless against the things that came through the Gate. People fell into despair and were ready to give up hope.

But there was hope. Perhaps due to the influence of the Gate, rare individuals who awakened abilities appeared, and they resisted and fought back against the invaders.