おまえが世界をこわしたいなら 2

As soon as the mangaka doled out the reincarnation sub-plot, I became extremely confused. I really loved the fact that the two main characters kept reincarnating and meeting each other, and always destined to kill each other. But I didn't really like the reason why this kept happening. It was because of some race that orchestrate people's lives like this? And the one in charge of that particular plotline was just a child? Kind of disappointing.