In that moment, Nero realized he couldn't see anything strange.
However, he could feel it.
A subtle tug on his soul, pulling at the fringes of his senses and consciousness. It wasn't like the watching sensation from before. This was invasive and yet intimate, as though something was reaching inside him to test the very boundaries of what he was.
A warning of sorts.
He instantly warned the others. "Be careful."
Arthur and Jacob suddenly stopped and turned to face him with confused expressions.
"What? What are you talking about?" Arthur asked.
Nero frowned. "What? What do you—?"
He froze.
His eyes began to widen as the world around him shifted.
"W-what is that?"
The other two turned forward, but they could see nothing.
Arthur frowned and placed a hand on Nero's shoulder. "What's the matter, Nero?"
The moment he touched Nero, however, he winced. Nero was burning hot, his skin radiating heat like a man afflicted with the fever in the throes of delirium.
