The regular sound categorically refuted the possibility of a bird.
Gary Smith's first reaction was an attack from the Nightmare Demon.
But then he thought, the Nightmare Demon was most formidable within the Dreamland, freely manipulating people's inner fears and illusions; coming to reality instead meant giving up its home advantage.
Could it be a demon brought about by a taboo curse again?
Gary Smith's gaze hardened, already imagining a many-armed and many-legged Spider-Man, a lizard-man, a tentacle beast, and other lethal monsters taking advantage of the early daylight when people are most off-guard, and somehow climbing to his window from outside the wall.
After all, this place does not belong to the Main City District, it's quite far from the Star Cluster Beast Tower, the city is situated on the edge of the Abyss, belongs to the borderland. In the past, there have been multiple instances where Demons or Evil God's Kindred infiltrated and killed humans.