I haven't gone back to the source manga to check, but I am pretty sure that they have amped up the lewdness of this adaptation compared to the source. I don't remember it being so explicit with nudity. Lewdness with clothes ripping? Sure, all over the place. But things like the bathtub scene with Kuroeda I don't remember from reading it.
In any case, the Alraune was my favorite part of this episode. I guess it is fitting that a plant species is pretty laid back. Plants aren't really known for their high intensity.