A red rain without warning washed the entire land.
Rain is both a gift and a curse.
Some people awakened their superpowers and broke away from their mortal bodies; some had their flesh and blood deformed and became irrational monsters.
The protagonist obtains a golden mask and inherits new abilities. The group takes a boat to escape along the waterway to find relatives, encountering strange fish and evil frogs along the way, and gradually unlocks the secrets of Red Rain and the mask.
