Lucius Malfoy Potions Professor

Harry was done with the wizarding world after the war, he moved to California with Ginny and was prepared to settle down. What happens when Ginny leaves him though? Harry and little James move back to the wizarding world when Harry is offered a job at Hogwarts. They failed to mention that Lucius Malfoy was the new potions professor. HarryxLucius.