Well I think you’ve already described the difference no? Majority (ofc not all) of the rape porn manhwas, the characters are 18+ or if it did happen when they were young it’d be a backstory and the current story would be when they’re an adult.
It is common for manhwas to not be as detailed as novels though, this isn’t really a problem with BL or romance manhwas in general, manhwas tend to be watered down from the novel and sometimes it just takes away the meaning of the story
yeah i guess its slippery slope from drawing 2 horny teenagers to actual kids fetishizitation/lolita shotacon stuff. might as well be strict about it
the whole novel is about two horny teenagers slowly discovering sexuality so the censoring in the manhwa rly opted out a lot. i guess koreans are really strict about minors characters going at it? i cant think of a manhwa where hs characters had sex before they hit majority age (always in side stories or if the characters are aged older) wonder why they cant be as strict with the rape porn straight manhwas which are frankly just degrading