Doushite? Ijitte Princess Final Road ~Mou! Mata Konna Tokoro de 3~

Prince Al is called by the king. It is about time to succeed to the throne but before that he needs to get the certificate of king hidden at a certain place. He decides to set off on a journey to find it. When he tells princesses about it, they say they want to go with him. They start their journey to find the certificate but monsters, who try to conquer the world, appear in front of them. They start the battles against them and....