I've seen Choi Tae Joon in Suspicious Partner and loved him in the drama so seeing he was playing the main role in this short drama I decided to give it a try.

Sure, you can't put much depth and character grow in a drama with 6 episodes each only 13 minutes long but it surprisingly entertained me. There is a bit of humor, which is actually nice and not cliché and has some sweet moments.
I liked the main characters immediately and don't mind the side characters much.
There's no use in going into depth and asking for motives here, because there's no way we can expect that in such a short running time. That's why I also don't mind the plot holes. I guess such a short watch is bound to leave open questions so it's not like I expected anything else.

There have been movies and more on the subject of robots and emotions and even if they started promising I haven't seen one that gave a satisfying answer so far. Maybe this drama could've gone deeper into this subject if it was a full drama with 16 episodes and a longer runtime per episode. It surely does have the potential for that and would be interesting. Anyway, I like the short drama for what it is. A nice watch with a good cast and likeable characters.

If you just look for something decent/nice in between and like Choi Tae Joon then you should go for it.