As far as I know there is only one game. Curt's 
chibi BA cels are from a music video that I have 
not seen. (Yes, I bought those too). Actually, I 
thought this cel was possibly from the music 
video as well until I got it. But with no 
sequence number, the high detail, and only being 
one layer, I don't think this was from anything 
that was animated - rather as a still one-off 
shot. What I'm hoping for is that someone has 
access to a version of the show that isn't the 
R1 DVDs and can take a look at the eyecatches, 
or possibly some kind of omake stuff?