The Absolute Princess and the Seven star of Castellañia

The Castellañia is well knoe us the school of many students who have power to lead a country, company and other higher rank that many wants to claim and one of this is the Absolute sit but for unknown reason the throne is empty the absolute princess was no were to be found and no one knows why or how did she left the throne neither the seven star don't know any of it even the first star who is very close to the absolute don't know anythiny.
What is the reason of Absolute Princess to left the Absolute throne now the Castellañia is opening for upcoming school ceremony.
Can the Seven star start the opening of school without the absolute guide? or they will take or select new student that suitable for the Absolute throne.