Post-drama depression refers to the feeling after a good television drama is over and you realize you have no life. The life without the TV drama seems so boring and meaningless.
The feeling of emptiness and sadness usually strike you during the finale. It can continue from then till weeks or months after the drama finished. The only way to fully recover is to find another good TV show or drama.
A: Why are you so sad?
B: I’ve just finished watching TV drama The Legend of Zhen Huan, and am having Post-drama depression.