How do you make the H-Scenes? Do you do everything in CharaStudio choose the right animations and align the characters correctly or is there a way you can make the custom maps in CharaStudio and put them in Koikatsu then do them there?
CharaStudio, yes. It often takes quite a bit to allign stuff properly. Specially if there's a considerable size difference, like Asteria's scenes. And also requires lots of creative camera angles if you want to not draw attention to certain things...