Ghouls are very dangerous in Japan, the Japanese state tried to eradicate them but in vain, because they are very hard and hard to die. The ghouls hide in their houses, during the day they are like ordinary people, different at night If a ghoul bites it, it won't kill the human, but it will spread the ghoul virus to the bitten human. The virus is characterized by humans not having an appetite for human food.The ghoul virus will spread when humans are bitten and quickly turn humans into ghouls.