One of the bonus books that make up the meat of Mimasaka Hideaki's recent output. According to Google "揺れるわね" means "It will shake."
Unlike most doujins or even bonus omakes, which feel pretty quality. This feels like it was banged out in some Kinko's in Japan, this shit wasn't even stapled together.
Regardless of the "quality" of the release, the drawings themselves are pretty interesting for the most part, and pretty well composed in terms of positioning.
The idea of her boobs having their own "skirts" and panties is so arousing I can't even fully understand it. I didn't even recognize the soaked panties on the floor on page 3 were from her tits until I saw page 7. The cover just made them look like an odd, kinky bra or something.