A slight clearing of the throat behind him goes unnoticed. ...As does a louder clearer. And louder. Until Shu is forced to tap him on the head.

"Ahem."

The throat-clearing is probably not necessary anymore whenever he takes off his earmuffs to turn around, but she does it anyway. As could probably be expected, Shu is holding a little lunchbox wrapped up nicely in a handkerchief for him.

"...I passed by four hours ago and noticed you here then. I presume you have not gone home to eat."