There's the small plotline in WN that was omitted in LN, regarding the final addition to the harem. When Rutina is first introduced, she's much more indignant and uncooperative than she is portrayed in LN (which is more than understandable, given her circumstances, LN's retconning of it was a meh move, IMO), so Roxanne and Sherry take it upon them to teach her proper behaviour. It happens while Michio is away, so no details are given (then again, there's a well done fanfic from Roxanne's POV where this gap is covered), but the implication is, it was pretty harsh.
Okay, now it's my turn to ask - excuse me, what?..