
A lot of people are bothered by age gap because there's naturally a power imbalance between a minor and adult, so consent is always an issue. As an adult, I just don't ever see myself liking a minor in a romantical sense, because I see them as a child or you know, a younger sibling. idk...This manga in particular i think is ambiguous, since I think the girl is 15 years old? she just started high school. He was already 15/16 when she was just born... but he respects her boundaries and hasn't really crossed it so... idk. lol. I personally don't mind age gaps if both individuals are adults. I just don't think that it's ok to normalize a relationship w/ a minor and adult, since a lot of teenagers would romanticize it and think that's okay, and maybe even intentionally seek that type of relationship. So this becomes dangerous for the minor.
Ok I get the "I betrayed you b/c I care about the country" justification but like... Perdel, dude, you've known this man your entire life lol. Why help someone become an emperor if you didnt think they would do good for your country... and did Perdel actually betrayed him? idek. I guess we'll find out lol.