"Nyaaa, that's a good way to look at it!" Well, it wasn't like it was that hard to figure out how to put on a yukata. Put your arms in the armholes and tie it shut. Simple enough.

"I'll see you on three, then~" It'll probably take him an extra moment or two to figure out how to get everything on properly, so theoretically it should give her enough to to do a fun knot with her obi