The slacker professor at Hogwarts

First, Dumbledore knew Gilderoy Lockhart was a fraud. Second, Rohar also knew Lockhart was a fraud, because he had transmigrated into Lockhart's body. The problem was, Dumbledore intended to bring him to Hogwarts as a negative example, while Rohar, this fraud who couldn't even cast the simplest spell, only wanted to relax and enjoy the vast fortune accumulated by the original owner. But ultimately, Rohar went to Hogwarts to become a Defense Against the Dark Arts professor. Wasn't the magical mansion and the overflowing Galleons more appealing? Or wasn't the achievement of a dozen bestselling books generating a steady stream of royalties enough to satisfy him? Or perhaps Snape and Voldemort, who were obsessed with his position, weren't terrifying enough? No, none of that. It was because Rohar was forced to go to the school by Dumbledore! So… he figured out a way to get through this year's term, and after a year, he'd be free! —————————— (This is from a completed 300 million-word novel, "The Grey Wizard of Hogwarts," quality guaranteed, welcome to the pit!)