Simply put, it's entertaining - no overtly complicated plot, exaggerated humor, or cheesy romance. I enjoyed my time watching through six episodes.

This isn't the K-drama for everyone. It's mature material loaded with scenes amped up on sexual tension. If you enjoy the childish humor and idealistic love affairs, you won't like this series at all, but If you can handle some cold realism, you might end up enjoying this k-drama. 'Bad Guy' reminded me of another k-drama 'Cain and Abel', which you should check out if you enjoy this series.

The romance between Hyunsu and Jungin is very heart warming. I also enjoyed the way Jungin's family members matured over time. Warning: Mrs. Kang is indeed VERY annoying. At times, I felt like I'd have a seizure from stress.