Man... This is like teaching a privileged child in Asian parenting style. Even if the Prince marries her in the end, living with an annoying privileged child is going to be so much hassle...
They confess huh... This either means:
1. The series is ending
2. The series will have tragic moments (Zagan or Nephilia dies, and then maybe revived)
3. They will have children and the story revolving around them will happen