This show really loves to explain the story through flashbacks, huh? Except that doesn't really help anyone because it's hard to follow. It really does feel like they're teasing everything by showing the history without explaining. Only problem is that Hiyuu is still very much an NPC with no value or purpose and emo guy, apart from his mother, we know nothing of. However, it does seem like the action is ramping up so there's that. But it's OK for now, nothing great.