Was expecting this to be a show to kill time, but I ended up getting hooked by the story and concept.
The pace is just right, the plot is smart.

It contains the concept of kinship, friendship, genre of comedy, suspense, thriller, mystery and slight bormance in 12 episodes.

It dives to the main plot straight ahead - which is how he got into an accident and woke up after - they filled the gap pretty quick. Also, when you think that the plot is just to solve last wishes of the deceased, I was wrong, it leads to a real investigation and the execution is just so brilliant. If you understand Chinese, it is even better as they do play around with the words and it creates a deeper meaning at the end of each episode.

Rewatch value is 10/10. It is similar to someday or one day, rainless love in a godless land. You got to watch several times to understand the deeper meaning. It is just smart, so if you are looking for an intellegent, short drama, this can be one.