Cashman of a Ruined Game

I fell into a ruined game as a full-leveled main character with S-class equipment, and an inventory filled with miscellaneous items.
To save this game–no, this world–I have to stop the final boss who will destroy everything.
Let's go to the Imperial Academy of Magic! With my young, rich, and pretty charm, I'll roast him, boil him, and lead him to the right path!