It looks good at first glance. I'm getting drowsy so I'll reread soon; I may need to have more material to make a thicker post. Botan's fear was adorable. So once Botan gets the readings from the library (also I have no idea how the fuck it works even after you explained it. A lot of words there xD) do you want me to return them home for dinner, and for Botan to analyze her data and sort through the bullshit she mentioned? 

I agree, however, I think we might end up slipping at some point. It can't be too soon of course, but Yoko is no fool, so just one little clue might make him suspect something. This may need to be something he wants to investigate in Demon World on his own, where Goshi died, and then get back to Botan about who he believes it is. I doubt Koenma knows Yoko took care of Goshi years ago, but he'll find out soon. Yoko has some good will for that, surely? xD