I work at a university lab researching anti-allergy medications, currently focusing on developing a drug for cat allergies, which have been increasing in recent years. My assistant is a student named Ran Himeno—she's somewhat sharp-tempered, but also clumsy in a strangely endearing way, making her an unexpectedly entertaining presence. We were deeply immersed in our research today when suddenly, Ran made a critical mistake. Was it a dream? An illusion? She somehow ended up creating an incredible drug. After taking it, Ran transformed into a catgirl, complete with cat ears. She began acting like a female cat in heat, purring and rubbing against me, desperately craving my cock. In the lab, I unexpectedly ended up fucking my assistant, now a full-fledged catgirl, nonstop. An explosive twist that changes KMPVR dramatically in 8K.