That is not any better...
They are only 2/3 year apart, much better than an adult with a child don't u think?
I agree everyone need to take a step back and breath. 1. I would like to point out that the TL yes does mean more like and R18 or there is going to be smut, it has nothing to do with the charaters ages. 2. In the original novel the smut happens with the Saint and the King not Nina. 3. People they ain't together yet and there could be a leap in year were Nina will be an adult and then they get together. Until then so far nothing has actually happened if you think about it.
Everyone needs to calm down about the age thing. In the original novel everyone was a teenager (TL=Teen Love) so the emperor is probably anywhere from 17-19 while Nina is 15, and from what I've heard the emperor waits for her to become an adult before making a move.