The Secret of the Maiden (#1 Witch academy)

Dear Diary,
I had found you hidden away in the attic, between antiquities and a trove of oddities. Normally, I'm not allowed to enter the attic because it is 'dangerous'. But it's not the danger I fear - it's the secrets they guard.
-R
***
Leonardo reigns supreme in this high-school, a striking figure who commands attention, with his handsome looks and athletic figure. However, fate takes a turn when finds an old diary in his bag. Driven by insatiable curiosity, he surrenders to the pull of its pages. Signed simply as 'R', the diary casts an irresistible spell, yanking him into the enigma that is R's life, racing against the hands of time.
Withing the dog-eared pages, he unearths the truth that lead him to a revelation: the enigmatic R is a fellow student. And she carries secrets that demand his unravelling.