I think the second one is bimbo Sarah, which means bimbo new game+ without enslaving or doll-ing her I think?
I meanwhile figured out that this is a scene in th hospital after enslaving tiff and then enslaving all unnamed girls in the scenes until the one that transforms into a monster. You have to enslave her using a chakram and then a new scene will later trigger where you have the option to enslave another girl and then this scene appears.