the key to my heart (iwaoikage)

kageyama tobio , a blue eyed boy who's life is full of nothing but empitiness, all alone in a big world that gives him only sorrow, first it took away his grandfather then his parents.The only person who he had left, his sister,had moved on and her own family .Now who would fill his with joy and happiness,who would teach him how to smile and laugh agin and who will find the key to his heart