Neko de Gomen!

A high school girl named Shiraishi Yayoi experiences a life-altering accident involving an experimental teleportation device orchestrated by her father, a physicist who calls himself a genius. During the incident, she fuses with a cat, resulting in a transformation similar to the movie *The Fly*. Whenever she becomes emotionally excited, cat ears and a tail appear on her body. In this transformed state, she gains abilities but also exhibits feline behaviors, especially when encountering mice. This condition complicates her personal life, particularly with her boyfriend, as her emotional reactions often trigger the transformation during their time together.