I believe the "sweatdrop" tag is not being used properly here, but it's a little hard to be sure. Her expression doesn't quite say "sweatdrop," and instead she just looks genuinely hot, which is supported by her airing out her taut shirt. I'm going to replace the tag with "sweat." If anyone decides to change it back to sweatdrop, please explain why.
... You aren't reading the mood properly, Ibuki's looking confusedly at the artist due to apparently she'd being asked to wear normal girl panties instead of her fundoshi.
