Then the bald man, cradling the walkie-talkie like a treasure, returned to his train compartment, sat in front of the control panel, and fiddled with it several times before carefully placing it beside the control panel and spoke.
"Mom."
"When this walkie-talkie rings and flashes red, turn the train speakers up to the maximum!"
"No matter what I'm doing, whether I'm sleeping or taking a dump, wake me up!"
The next moment—
A mechanical, melodic voice echoed inside the train compartment.
"Received."
Every train captain can name their "Train Assistance AI" to make it easier for the AI to receive commands from the captain. He named his AI Mom, after his mother, who had succumbed to cancer after several unsuccessful chemotherapy sessions before the Doomsday.
After completing all this,
