This drama would be perfect if not for the lack of coherence plot-wise, the background story is well defined and it had a lot of potentials.
After a couple of episodes, it felt like the production was throwing punches in the air to make sense of events.

The main one being when Jee Soo dies. She called Seo Woo when she was about to die, Which is just straight-up unrealistic because when someone is in a life and death situation they do anything to survive. She should've called Ha Won who knew where she would be and would've been able to contact local authorities and rescue her.

The second one is how Ha Won deals with his mother's murderer. He's basically just crying on a corner when he should be doing anything to get back to him or at least settle things with a punch or two. Either he's an ANGEL or I don't know.

The last one isn't really bad per se it's just that I find it annoying. The way Soon Ho handles knowing Kang was guilty of the death of Ha Won's mother. It's just infuriating to see her take the side of someone with who she has no connections other than wanting him to feel better or something.