When Akihito Kanbara sees a fellow student looking all set to jump off the school roof, he does what anybody would do - rushes to the rooftop to coax her down. In return, this bespectacled girl does what anyone would do in this situation - she jumps over the fence and stabs her saviour straight through the heart.
Luckily for Kanbara, he's no ordinary human, but rather half-human and half-youmu,