So many people demonizing sex in this thread -_- Can we not?
Am I the only parent who thinks you should maybe look into the things your kid does before you let them do it if they're of a certain age? And I don't just mean reading the rating, maybe check out the app, be involved with their lives and stuff. Take an interest in their interests.
I get that if the rating of Teen doesn't include sexual content, that it is misleading... but I feel like a lot of things that are PG or even PG13 have sexual content too and those are considered age appropriate for people of those ages. My point being that ratings aren't perfect, and it should be the responsibility of the parent to be the parent.
Everything I've come across on webtoon that is explicit has some sort of warning or rating attached to it. I think leaving it rated Teen is fine.