It could be a good drama about bully falling in love and becoming a good person. Here in this drama bully indeed fall in love and became good boy, but it failed to become a good drama. It's because, the story line was a out of place.
Backstories were not ripe enough and romance between main leads were sudden. it felt out of place too. (as of episode 6, became much better since episode 7)
The story-line become much better in episode 8. I just sincerely wish that it does not turn into another cliched. I'm enjoying this drama and I sincerely hope that it does not leaves a bad taste when I finish watching.
Oh, you will find so many "main lead side characters" here .