Blood Abyss Tribe

Under the neon lights of modern cities, there is an ancient alien race named "Yuan" hidden. They were once gods or monsters in human mythology, but now they are dormant in human society, trying to reshape the world by awakening the "Old Throne". In human society, a secret institution called "Night Watch Academy" specializes in recruiting young people with "Abyssal blood" (that is, a mixture of Yuan clan and humans) and training them to become weapons that hunt the Yuan clan and protect the world.