30,000 years ago, sentient beings from the Dark World, called Remnants, invaded Earth hoping to make it their new home. The Guardians of Earth fended off the attacks of the Remnants by sacrificing the Key, a boy named Kairen, to seal the gate for another 30,000 years. In the epic battle the heroine, Jinno Hazumi defeated the Remnant leader, Kijima Touta, and with the help of…