The 12-episode 2006 anime seems to be meant as a remake or re-imagining of the franchise (along the lines of Negima!? versus Negima!) within the Genshiken universe, as members of the club comment on each episode during the next episode previews.
In the first one, both Asuna and Haruna are dressed as oni, while in the second, Asuna is composing while sucking on Chupa Chups lollipops.