Thanks for the chapter!
I wonder why Ao thinks it's more important to follow this ghost than find his sister haha. He couldn't assume for sure that his sister would have a ghost leading them somewhere too. Also, can anyone remember why it is that Ao and the blonde girl don't have mobile numbers or email addresses they can contact each other on? I guess the police might have seized the blond girl's phone, but she should still be able to use the other girl's phone to contact ao , and the other girl should be able to contact ao's sister.
They all just kind of think "let's go here!" very abruptly. Some of the decision making is so strange. Like Ao getting caught killing by his sister and instead of saying something like "I can explain, but right now we need to leave" he thought "hmmm why don't I tell her that I just love killing" . I get that people make weird decisions when they're very stressed and tired but still that one seems crazy.