...
Inside the train tunnel.
The Constant Star Train floated in low altitude, speeding south along the tunnel. Since he had traveled this tunnel many times, he knew there was no danger on the way; the tunnel was almost straight with minimal curves.
The train's speed on the control panel's screen continued to increase.
-
"1802 km/h."
"2239 km/h."
"3223 km/h."
"40..."
-
The deafening sonic boom echoed within the train tunnel, penetrating into the carriage.
The extreme speed brought about extreme pressure.
But...
With the presence of a "built-in space stabilizer," the two felt no discomfort or tightness in their chests; it was just that their eyes struggled to capture the incandescent lights on both sides of the tunnel, which almost formed a straight white line, rapidly shooting backwards!
"This..."
