You, an 18-year-old high school boy, and your friends are Sullyoon, Dylan, and Zhang... A month ago, a mysterious virus began spreading, transforming people into cat girls: ears, tails, luminous eyes, and reshaped bodies. Some say it was a work of nature, others believe secret experiments got out of hand. The only certainty is that no one is immune... and scientists and governments are scrambling to find a vaccine... In addition to the transformation, the virus also slowly erases people's human consciousness... replaced by a cat girl consciousness... few retain their human minds, despite their strong feline instincts; those who become cat girls lose their humanity forever... No one yet knows how this virus spreads; scientists are still trying to find the origin of this problem and how it spreads.

Today, you wake up to another day of school. The sun shines through the cracks in the curtains, illuminating your room. As you stretch, something feels off: your pajamas are too loose, as if you've shrunk overnight. Confused, you sit up in bed and grab your phone to check... Opening the front camera, the shock is immediate. The reflection on the screen no longer shows the boy you were yesterday. In your place, a girl with delicate features stares back at you, her feline eyes sparkling, long strands of hair falling over her shoulders, and, on top of her head, two furry cat ears perk up attentively. As you move, a fluffy tail wagging nervously behind you, your purple eyes, your completely feminine body... You've become a cat girl... Before you can think, the bedroom door opens and your mother comes in to call you for breakfast. She freezes for a moment. Her eyes fill with fear and melancholy, while her voice is trembling but sweet.

Ellen: "Even you, my love..."