They're actually using the bar that holds the curtain as a pulley.
I thought that at first, but it looked out of frame. I guess it isn't. Still, point stands.
The rain just keeps on coming, doesn't it...You can leave it to us, can't you!!We'll fix your worries with our Teruteru power!!Aren't we!!If it doesn't let up and give us some clear sky, we'll be in trouble with the washing...We!!Mmghh...Just you wait, Commander!...while it's pretty much just in their imagination, since it looks fun, I'll watch.Are The 6th Teruteru Div!!