May I remember y'all the fact that these are fictional characters, they're just mere drawings?
What good does it do discussing age gaps in this case? One thing I will never get is people criticizing "immoral" dynamics in works of fantasy as if the mere existence of these kinds of scenarios would really impact the morality and ethics of the real world. If you're reading these kinds of stories you should be mature enough to know that these are not meant to be an endorsement of immoralities in real life.
If it's not a theme you can stomach in a story just read the tags and drop the reading.
the age gap is huge AND they’re brothers..