Hakari had to get her manipulative mind from somewhere, so it's no doubt Hahari would be able to pull something like this.
If Kishika could just abandon her sense of shame, then she'd realize she and Hahari are pretty much perfect for each other.
Also, I just love everyone's reactions at the end. While most are just unnerved, you've got Yaku going dot eyed as if she's wondering if this is just something "young people do these days", Rentarou covering his face with a full blush that I can't tell whether its meant to be from embarrassment or if he's secretly enjoying it, Momiji with a light blush as if she's thinking about whether she likes what she's seeing, Mei wiping away a happy tear at the sight of her mistress so fulfilled, and Mimimi just looking at it as if appraising a piece of art.