[Oh, so now his tune was changing. The arm has Katsura stopped in his tracks, though his arm is still raised ever so threateningly...]

It's Katsura. And you want my help getting in the water? What about "that time of the month" and everything?

[But the other arm finally comes and crosses over his chest, and Katsura's ducked out of the other's grip to turn and face him.]

You could've just asked for my help in the first place.

[You should've just asked for his help in the first place. At least a smile is now on his face, nodding a bit to himself as if confirming something.]