Tokyo Ravens

Harutora may seem like an ordinary guy, but he's actually a descendent of an ancient and powerful clan of omyouji. Born without the family talent for magic, he'd always believed he was destined for a normal, boring existence. All that changed the day Natsume, a beautiful face from Harutora's past, barged back into his life and forever altered the course of his future. When her sudden arrival leads to a violent and tragic encounter with a magical prodigy, Harutora agrees to fulfill a childhood vow by accompanying Natsume to the clandestine Onmyo Academy. Together, along with their incredible onmyouji classmates, they'll attempt to survive life at a school where not even magic can get you out of your homework.