It tells the story of 500 years ago when the world of demons and gods stood in chaos, the world was uneasy, and rivers of blood flowed. During the fight between the Emperor of Heaven and the Demon God, the Demon God dropped a drop of blood into the mortal world and turned it into a weapon called a bird. It was rumored that this weapon could make a wish to the Demon God. In the world 500 years later, people would treat this as a chat during meals, but four teenagers used this sword to protect the peace of the world.
Intention: Evil things can also be good, and young people take the responsibility to protect the common people.