I'm starting to understand Korean suddenly recently. Except for technical term, I can understand 50~60% of conversions in drama. Come to think of it, I have over 1000 hours input of K-drama and TV program. I've studied English for 7 years but I can understand only about 60%, which is almost the same as Korean even though I've been studying Korean for just 3 months. 😂 If I keep studying Korean, my Korean would be much better than English within 7 years.