Cast is completely different from the anime. More accurately, since
the audio drama came before the anime, I should say that the cast for
the anime is completely different from that of the audio drama.
Daisuke is voiced by Hoshi Souichirou. It's an excellent casting that
I wouldn't have imagined getting outdone, but it was! Irino Miyu is
an even better fit! Harada Risa, voiced by Tange Sakura, is also
outdone, in my opinion, by Asano Masumi. You know what? I think the
entire cast is good to excellent in the audio drama, and yet the anime
does better in every way.
Daisuke : Hoshi Souichirou -> Irino Miyu
Dark : Onosaka Masaya -> Okiayu Ryoutarou
Riku : Imai Yuka -> Nakayama Sara
Risa : Tange Sakura -> Asano Masumi
Hiwatari : Seki Tomokazu -> Ishida Akira
As much as I like Seki-san's voice acting, his voice isn't very
effective as Hiwatari. Ishida-san is much better for the role.
Onosaka-san is also not _cool_ enough as Dark. Okiayu-san is better.
Okay, that's enough about voices.
First disc is a bit rough on the edges due to the need to introduce
everyone, but is still very entertaining and interesting. Story moves
a lot faster than in the anime and the relationship square
(Dark/Daisuke/Riku/Risa) is presented sooner and more clearly.
There's nothing concrete in the first disc, however.