In the past, a talented man from a prestigious school had a bright future ahead of him. Suddenly, a rain fell from the sky, strange beasts appeared, and all his life plans collapsed.
His livelihood was cut off, his savings were wiped out, and his parents' whereabouts were a mystery, leaving only a mysterious number with an unknown origin.
A phone call revealed the secret of the world: it is a lawful stronghold dedicated to eradicating the evil spirits in the rain and protecting the remaining humans.
At the end of the road, he resolutely embarked on a dangerous journey in troubled times where strange beasts were rampant.
Fortunately, one person fights side by side in the endless blood crisis. The two trust each other with their lives, and they are each other's only support.
Even if it rains endlessly and the road ahead is full of dangers, I am willing to stand side by side with you to protect the only remaining human fireworks in the world.
Purpose: Under disasters, people's hearts will never fade away; in desperate situations, faith will never die. I am willing to use my sharp edge to protect one's stability and keep one's peace of mind.
