Those're BeyerDynamic DT880 Pros, looks like. Dunno what impedance.

Still, not a bad choice. I've 770 Premiums, myself.

This image was one of three CD covers used for Youjo-Teishoku's doujin drama CD.

"Ore no Gensoukyou ga Konna Koe no Hazu ga Nai!"
http://yagamiharuka.blog84.fc2.com/blog-entry-346.html

Was the CD as entertaining as this image implies?
Because it looks like Sanae and Kogasa started a radio show. And that would be glorious.