Both are centered around AI, although the female lead in I'm Not a Robot is only pretending to be an android. Specially if you thought Are You Human Too? lacked a bit of actual romance and skinship between the leads, I'm Not a Robot might be what you're looking for.

Both have the theme of robots, although in I'm Not a Robot the leading lady is only pretending to be one, while in Absolute Boyfriend the male lead is an actual android. Even if the similarities between these two dramas start to dwindle as they progress, I think specially if you liked the first third of I'm Not a Robot and romance centered around AI, you'll probably enjoy Absolute Boyfriend.