Tokyo, January 29, 2030. High-frequency resonations and red fog envelop the city. All the people and animals who heard that sound fainted. People in Tokyo believe the fog is carrying a virus and spreading disease outbreaks. Six days after the incident, people woke up as if nothing had happened. The closed city of Tokyo slowly returned to normal. However, since then strange and mysterious events began to occur. Not only that, young people soon realized the hidden power in their blood had risen.