Haikyuu!! dj – Parts Per Two Billion

In an attempt to "get along better" Hinata asks Kageyama to spend more time together. After a while, Hinata brings up the fact that he saw something on TV about humans being alloted a certain number of heartbeats per lifetime. They argue over how many spikes Hinata can hit during that alloted time and things he is and isn't allowed to do to make his heart beat faster…