The real life age gap between the male and female lead is mind blowing, but i never noticed it while watching the drama. They are hell of a good actor and actress.

I think it ads to the chemistry. Because only stunningly beautiful women can seduce younger men, and only highly intelligent men can seduce older women.

Ofcourse there are great couples in various age groups. As long both are adults and consent on the same terms and its for the benefit of both.  Then what others think doesn't really matter.

I agree the chemistry between the ML and FL is brilliant