
Actually we can say that. This webtoon is not a cautionary tale made for awareness nor is it a perfectly historically accurate recount of a past time. It is a fictional romance written in present day which means that it has no excuses for glorifying/normalising pedophilia and/or grooming.
Also, she is way younger than 12.

Also just because some societies lacked morals, education and the law was extremely flawed- doesn’t make men who preyed on children back then any less pedos. It wasn’t common for old men or even men in their 20s to chase after 12/13 year olds. There just wasn’t a law in place to protect children from predators since the law literally saw them as objects.
We can't say he's pedo like this is based on historical point of view and we know in olden times a girl who is still 12 can still get married to a man who is 20 and above sooo ya know