The starting of the drama is very similar as the ML in both dramas start off as a corrupt individual (works for money) and then are forced by circumstances (K in Bad and Crazy, parallel Universe in Welcome 2 Life) to fight against the bad guys who supported them.
And they both get assaulted by the FL in the first episode as soon as they are introduced.
And they both get assaulted by the FL in the first episode as soon as they are introduced.