How big is the age gap? I hope its not just a few years.
I think its less than 6years. Because he mentioned in ep2 that they met at his 9 and they have known each other for 20years or more. It means he is more than 29 years old in my understanding. And she is 35 now.
http://mtv.jtbc.joins.com/cast/PR10010757/2