Sagyo Junna has been running from their problem for two years, but she’s gradually catching up. That problem being their ex-girlfriend they resurrected from the dead. It turns out resurrection isn't all it's cracked up to be, more of an eternal torture, existing half dead and half alive. One can see why Isshiki Ibuki is Not Happy.
Maybe the real problem is that Junna isn't able to exorcise Ibuki... or maybe it's that even if they could, they might not want to. Now that they're back in Tokyo, though, Ibuki has become EVERYONE'S problem and they might not have a choice.