6.5 yes, it was all nice and cute until well, it is too much out there. I watch dramas because it can be "way out there" in terms of reality but I think this is where I draw the line. The robot was just well a robot. The humanistic side in me kicks in and just could not accept the fact that she preferred the robot, for me that is kinda sick. Sorry, the ending lowered my rating very much. I just wish they brought more healing in the human Sin's character because it was as if he was just left hanging and did not have a proper character development. Anyway, the lead actor was very convincing in his "robot" acting skills and not to mention he is an eye candy....