I've been kinda waiting for this announcement, so I'm not really that surprised :P.
in addition to the novel and the manga, there was also a Drama CD. if I recall correctly, the seiyuus cast were: Ono Daisuke (as the main character), Nakahara Mai (red-haired girl), Shiraishi Ryoko and Chihara Minori---can't remember the others. hopefully they keep the same cast, since they were pretty funny, especially Chihara Minori, who was doing her Nagato voice once again.
