• 30 years ago, a shipment flying to the land of this Helion. The "Arrit" stranger on the ship was friendly and Helion was glorious by taughting a number of technologies that helion couldn't have. However, one day suddenly the Arkrit disrupts your friendship relationship. Corrosion Disease: The world has released a disease that turns the human body into a odd appearance. The army soldier and protagonist Dalion is announced that the mother was infected with corrosion, and was defeated by desperation, but rising the decision to find a treatment for corrosion