Board Thread:Questions and Answers/@comment-294840-20171030012025/@comment-28783361-20171030024250

You're not missing much else. If you talk to the red-robed succubus and mess with the customization options there's a switch that will cheat and turn everything on and bring everyone back so you can talk to them (plus disable saving so you can't mess things up) but other than that the customization part is the the main part and there isn't really any significant story stuff.