Rating Justification:
Story: 8/10 - I did enjoy this drama a lot. The story was interesting even though it was quite short. The combination of each of the character's shortcomings and potentials was very exiting and pleasing to watch. It was a delight to get to know their stories, but I feel like the story ended half way through it. I would have liked to get a better insight of both their relationship and their business.
Acting/Cast : 8/10 - Kai was obviously the main reason for this 8. This debut was brilliant! He was surprisingly good at acting and very quick witted. The other characters were also very enjoyable and likable.
Music: 5/10 - I honestly have no idea if this drama even had music. I do not remember a single song or jingle from it...
Rewatch Value: 7.5/10 - This criteria is a bit hard to judge for me, seeing as I am a person that doesn't enjoy rewatching things that much, so I have decided to judge this based on how much I predict I would enjoy it in case I did rewatch this drama. I have stored it 7.5 (0.5 above the overall rating), because I would actually like to revisit this drama and think I would probably appreciate it a little more. 
Overall: 7/10 - It is a very entertaining short web drama. Very enjoyable to watch and very quick to power through. Would recommend to someone who is either just starting to watch korean dramas or wants a quick fix. And of course someone who loves EXO!