Magus of the Library by Mitsu Izumi
A book for book lovers! Theo Fumis loves books, but because he lives in the slums, the town librarian refuses to let him borrow books or even set foot inside the library. That doesn't stop him from sneaking in to read them though! Due to his mixed ancestry, easily apparent by his pointed ears and blonde hair, Theo is shunned by nearly all of the town's residence, and books are his only escape from his harsh life. A life he dreams of leaving behind by becoming a kafna.