Harry Potter: The Arcane Thief

This isn't the Harry Potter universe everyone knows, but a parallel magical world. In this world, a girl named Rose Potter Black has faced the same fate as Harry Potter. Hogwarts School of Witchcraft and Wizardry still exists here, as does Sirius…

So you'll see a very different storyline.

Lucas was thrown out of the orphanage when he was very young because of a mysterious power that appeared in him by chance. He spent three years learning to steal just to survive, but his luck ran out when he was eleven. He chose the wrong target and stole something from a dark wizard.

On the brink of death, he made a pact with a System that could teach him magical skills related to stealing. The System's first demand was that he accept an invitation from Hogwarts, a school for young witches and wizards with magical talent.