[answers are definitely not coming from Kaoru's direction. instead of anything remotely helpful or anything that even hints at being remotely helpful:]

I'm sorry to bother you, but I... don't understand how this works. [Kaoru glances briefly toward the floor, apparently struggling with embarrassment.] I've never seen clothing like this before, so I don't know if I've fastened the back properly. If you would be so kind, I would be very grateful if you checked.

[the soft pink dress is simple enough at least, but all those buttons... unused to restrictive sleeves, Kaoru has faced an intense battle trying to get them all done up.]