The latest in this drama CD/book series from Otomate, featuring Kiiyan as Ikki and art by Hanamura Mai will be released on 8/8/14 and cost 2000 yen. Previous entries in the series include Amnesia’s Shin and Toma, and Hakuoki’s Hijikata.
From the “Grapedia” on the Fan Club site, here’s the gist of how the name came to be —
e-zuka suggested something putting “velvet” and “spiders” together. Kiiyan countered with “rodeo spiders,” which was rejected by e-zuka as sounding too much like a biker gang. A little more back and forth and GRANRODEO emerged victorious.
The name has been messed up over the years, with them being called GRAND RODEO in festival listings and … Rodeo Grand at a particular bar.