The plot is just dragging at this point. How many chapter do we need before the apparently 20+(?) siblings realize that the royals care about them and move with them in mind? Since they manifested they should just request a proper magic training even if for self defense only.
Still need an explanation as to why they ignored them but I'm also in the same mindset as the twins.
I kind of pegged the 2nd prince as a fragile character (cause of the long hair xD). I hope that the twins learn some sort of magic soon.