In the quiet between tick-tocks of Nobita’s old clock, the sound came again — long tiếng : a long, lingering echo.

And the drawer stayed open — just a crack — for the rest of his life.

Outside, the stars of the 22nd century blinked once, as if a certain blue robot were smiling down, whispering: “I’ve always been right here, Nobita. In every long echo of your courage.”

Nobita placed his palm on the drawer. It vibrated.