assisting in an experiment (stickerless version)

stickerless versions of 'assisting in an experiment' The idea for this is from myself. The bakenekos Kuro and Yūgure are the OC's from a694 (:icona694:) https://www.pixiv.net/en/users/42994204 which allowed me to use them. ---------------------------------------------------------------------------------------------- story first picture: first part: Fumi: "Thank you very much for wanting to help me with my experiment! All you have to do is stand naked on these two points!" Kuro: "Aha! That's all we're asked to do?!" Yūgure: "But it's still a bit embarrassing!" second part: Kuro and Yūgure don't really mind being naked in front of each other. Because the siblings have often seen each other naked. Only that they are naked in front of Fumi is a bit embarrassing for them. Still, they do what Fumi asked of them. As they stand as desired... third part: ...a strange light fills the room... fourth part: ...and both were turned into mannequins. fifth part: Fumi: "Very nice! Time to prepare the experiment!" story second picture: first part: Fumi: "Okay, time to turn those two back!" second part: Fumi swapped the pelvic area of the mannequins with each other. third part: The strange light fills the room again... fourth part: ...and both turned back into living beings. Kuro and Yūgure immediately notice that their crotch area feels weird and look down... fifth part: Kuro: "WTF! My cock is gone!" and grabs between his legs "Wait, that feels like a pussy!" Yūgure: "Whaa!!!" Why have I a dick?" and gets an erection sixth part: Fumi: "I see your swapped body parts are functioning perfectly normally! As part of my experiment, I want you two to write me a journal of your experiences with your new genitalia each day!"