Clearly it's your view and u wanna think that way he didn't raise seme , he is prince and soon to be king uke just stand by stay in his room by midnight playing cards for the last 5 years ... He surely developed feelings but better look at story is based in historical time we cannot put present day morals here when seme is clearly kid but mature enough to make a deal to survive cuz uke father is after killing him.
If it was written in historical times, historical but this story wasn't written in those times was it? Just because the theme of the story is historical, it doesn't mean that you can't have modern morals in it, the author is LIVES IN THE MODERN TIMES I would understand the fucked upness of it all if the author wrote this in the 1700s but that's not the case now is it?
Why are we acting like some morality when story is filled with more than age gap its has more problematic things rape and beating here than to see age gap as a cause ... If u think it's alright to read story which has pedo is alright then written by old author it's also ur problem cuz it's not even normal for old time to view it in present.... Either u read story or stuck to those fictional straight stories

Okay so I just read the first chapter and...... I'm sorry but is this not pedofilia