The first 2 episodes can hook you up, however it did not make use the mafia properly, there are mafia story moments however due to culture differences story became the same political story from a person trying to get revenge but the villain has some connections with authorities, another thing is the editing.

The only thing that saved the series is the BGM, the male lead, and the supporting role,

For the story, the writer and the director could have used this opportunity to introduce a different story,
the series is good, but it is not rewatchable I gave it an overall score of 6. It could have been better.