Yeah his fear felt weird. In his old job he was preoccupied with working hard and slaving away, and his boss was a dick, but living in fear of him wasn't particularly emphasized. It's acting like the guy used to hit him or something.
And 2 days labour seems cheap. You'd think there'd be a catch to keep them around for longer. I expected Shizuka to be carrying a weapon of some description, but even if she did I suppose it's no place to use it since they now need to help of the baseball fellows.
They really do need to learn to secure their perimeter before talking and wasting time. Thanks to not doing that, they now get stuck with the most generic RV.