Looks like Agga Ruter, but nope, that cel's from 
Masquerade.  Agga Ruter's really funny, btw, even 
beyond the "It's PORNO and they look like TENCHI 
CHARACTERS!" factor.  Masquerade was just boring.  
The cel on the main page is the maid from 
Masquerade, as is the cel next to Shayla there on 
the "coming soon" page.

I do wonder why I've not seen many cels from either 
series floating around, knowing AIC's cel release 
policies back in the day.  I'd love to have a shot 
of the robots from Agga Ruter.  And like Ash said 
below, you can find more about these two series at 
www.hentaijump.com.