CW Hart
*Spoiler alert*
You mean the one where Rena kills that woman and her boyfriend for trying to hustler her dad, or the one that will be shown in season two?Is is best to white that stuff out... but yeah. I think that was the arc that reveals a few different things and how they really happened... I have watched the show three times but I tended to skip around quite a bit. I am not the type of person that enjoys torture/gor but I do enjoy the really deep story and decoding all the puzzles.
****Spoiler****
Like the fact that Mion had a marker not a needle in the end of episode four and Rena tried to hug Keiichi to calm him down when he snapped but he attacked her for it... Keiichi was just so paranoid that he was seeing everything as a threat and not as what it really was.