The madlad made a sequel. And here i thought it ended because he wrote himself into a hole going from bug-themed assassin manga to bug zombie apocalypse and just gave up.
This isn't a homophobic thing but a family succession thing. You can't just adopt a child and make them a legitimate heir. They need to have a direct blood connection with the king in order to pass along the line. If neither the father or the son have siblings then it means that all his evil...