I agree that there is too much unnecessary age discrepancies in TV and film, but sometimes that is the point the authors are trying to explore. I may be misremembering, but I think I even Humphrey Bogart thought he was too long to be the love interest of just-back-from-private-school Sabrina in the movie of the same name, so that works as an example of where the ages should have been closer. There was no reason for the disparity.

In contrast the disturbing relationship in L.I.E. between a teen and a pedophile had to have that age disparity (I’m not recommending this movie and I do not think it appropriate for most audiences – I saw it as part of a film festival and was not ready for it, but I do feel it has a right to exist).

I have not seen the webtoon in question here, but from the title, it sounds like the whole point of the show is the age disparity – but that is not an appropriate subject for kids. That’s something that should only be tackled in an NC-17 style drama because as soon as you make it light entertainment, you normalize a bad behavior.