I don't get it. Did he get new women in the harem since he killed all the previous ones? Otherwise, I doubt anyone would barge into the harem and claim they're harem women when the guy killed everyone and is known to be violent so unless he got them there, would they dare just come in on their own ?
Also, I get that the author is going for the pure image for the MC but after having seen everyone that happens in the harem from the shadows, why is she still so fucking dumb and overly trusting ? There is a difference between innocent/sweet and straight out imbecile pushover.