"I don't know whether to be relieved or offended," Gen said lightly back, grinning, teasing. "And here I thought we had some manner of iendship-fray."

But then he sobered. His expression lost a lot of its bright, teasing edge, even if he never truly lost his smile. Senku knew him well enough, however - Gen was concerned. Very concerned.

"Which means she can sort of tell wherever you are on the train as well, I'd imagine," Gen pointed out. "What else can she likely do?"