Started losing interest

All the previous episodes were marvelous. The plot and story. The acting too. It's just that I started losing interest in this series after episode 6. I don't know why. It's hard to understand one's emotions. But it's a good drama, cause unlike some dramas, I stopped watching from episode 2, namely Fight for my way. It's not that Fight for my way is inadequate, it's just that it doesn't fit my tastes.