Too prolonged with boring and old plot twists
Usually, I am someone who prefers long, 16-episode dramas but this one felt too long for my personal liking. The romance in this was absolutely unnecessary and did not feel genuine. The romanticizing of the teacher/student relationship with a huge age gap was too much. The speed at which the ML and FL got together was too fast and during the whole drama, it did not even seem that the main leads were in love. It would be better without the romance.

Also, the story got boring pretty fast. The first half of the drama felt okay (except for the romance) but the more episodes aired, the more boring it got. The script was poorly written. The main mystery of who killed Chan's sister and why was too simple for revenge and politics-oriented drama. The whole plot/story could have easily been told in 10 to 12 episodes. This drama brings nothing new, it hardly keeps the viewer entertained.

It was a huge let-down for me.