An appealing group of players make the story fun in the same way as, say, Bewitched. Aibu Saki is the definition of cute in the role of the girl, though the remainder of the cast acquits itself capably as the people who slowly come to realize the strange situation. Of course, there are the expected episodes of mistaken identity as the robot gradually proves to me more "human" than the rest of them. This is the kind of fluffy entertainment you can polish off in a night or two - realizing, of course, there are eleven episodes.
For the genre, Zettai Kareshi ("Perfect Boyfriend") is refreshing and sweet, with any number of small laughs thrown in for good measure.