Ninth Year Students at Hogwarts

Sisyphus's life at Hogwarts was extraordinary and unprecedented in the school's thousand-year history. After enrolling for a year and a half, he returned to the factory to retake classes and came back as a new student. I thought that just by hanging around, Shuishui would be able to graduate successfully. Become a professor, become a principal, and reach the pinnacle of life. But who can tell me! Why Merlin is still alive. Why can't I kill the monster without a nose even though there are no Horcruxes? Why is the main mission called Rebuilding the Glory of Britain? Why is the title of the graduation thesis called How to Kill a Demigod Correctly? No, no one told me. This Hogwarts life simulator is so difficult to play.