When a person's heart is controlled by a kind of despair, a strange virus hidden in the human body will have a one-in-10,000 chance of breaking out.
Once it breaks out.
That person will become cruel, bloody, and even eat human flesh.
They have high intelligence and super fighting power. They... Are the darlings of darkness.
Once they appear, they are always accompanied by blood and despair.
They are called "fishy beasts".
Each "fishy beast" has different awakening abilities. But they are all inhuman.