Just became a godfather, and you said this is Hogwarts?

Erwin, who traveled through time and space to become the only son of a mafia family, used the novels and TV series he had read in his previous life to save the crumbling building and pull up the Cavendish family, which was in crisis. Just when he was thinking about his happy life in the future, the appearance of an old man with a white beard changed everything. It turned out that this was the magical world of Harry Potter. At the same time, the golden finger required for travelers arrived, and you can draw cards by gaining reputation. ..........The appearance of Erwin quickly changed the wizarding world. Pure-blood family? The wizarding world only needs one noble family, and that is the noble Cavendish family! Hermione: Becoming a vassal of the Cavendish family is my first...