I really hate the Crown Prince but it's not his fault. His father's a d*ck and his mother died when he was at a young age. On top of that, nobody taught him that it was not ok to blame others!!! I genuinely feel bad for Nora because his parents are kinda sh*t too. How could they call themselves parents if they don't trust their own child or let their child try to explain a situation?! But I have to give some credit to the mom for trying to find out why he is distant from them (even though I still hate her). I know that parenting is hard and not always perfect but if Nora's parents kept repeating the same mistake then Nora will grow farther and farther away.
I don't know if I'm wrong but the snail guys did "conquer" earth because apparently the MC's name means earth ¯_(ツ)_/¯