Empty Hearts

Ever since he was little, all Kageyama could hear was the idea of soulmates. When a person was born, an outline of a heart was imprinted on their wrist. If the person finally meets their soulmate, the heart would be filled with black ink and their initials would be written in the middle with white. However, soulmates don't always work out. If your purposed significant other were to reject you, the hearts would fade to grey. And for Kageyama Tobio, the four grey hearts on his wrist were stacked right on top of each other.