It's far more of a comedy animu than a fanservice animu. They just make use of their OAV status to do perverse jokes too.
There's nothing deep here, if that's what you're asking, just some guy fucking around with his maid robot for three hilarious episodes while she debates whether she likes him or should run away. Sort of like an ecchi chobits, without vagina buttons. (Although this means they have actual pussies [not drawn])
It parodies marimite for a while in the 3rd ep too.