In my country you are considered an adult at 18 so same thing.
What i was saying is people are bitching about "underage" fanfiction characters yet they are always found in this kind of thread.
Everyone portraits characters age differently. Look at anime. Characters that look old enough to be adults are underaged (ex. Ichigo, baki) and others that are little kids that are 100+ y/o.
Maybe artist draw youngsters because they didnt have sexual experiences in their youths.
If they wanted it to appear as pedophilia or rape, trust me they would make it obvious. There are some bara mangas that are pretty disturbing, the artists acknowledge it and touch up on it with letters at the end.