By day, Yukari is a ghost haunting the grimy kitchen of a provincial restaurant. Invisible. A failure who washed her dreams of a life in Tokyo down the drain along with the leftover food. She is drowning in the quiet desperation of a life unlived. But by night, she is reborn. In the abandoned, forgotten corners of her city, she becomes Onu-chan—an enigmatic online streamer with a cat mask and a platinum wig. Her stage is a dusty classroom in a derelict college, a forgotten Shinkansen car, the rooftop of a neon-lit love hotel. Her audience is a faceless sea of anonymous admirers who crave her audacity, her vulnerability, and her slow, ritualistic disrobing. For them, she is a goddess, a mystery, a fleeting evening fragrance. For Yukari, the streams are a rush of adrenaline, a fleeting taste of power and control she has never known. What begins as a desperate escape from a suffocating reality soon spirals into a dangerous addiction. The validation from her thousands of viewers is a drug, but the line between Yukari's quiet despair and Onu-chan's reckless performance begins to dissolve. Each stream must be bolder than the last, pushing the boundaries of exhibitionism and sanity. The thrill is intoxicating, but the risk is absolute, and the psychological cost is mounting. Now, a ghost from her past returns. Ayako—the one person who knew the real Yukari, with all her insecurities and hidden depths. The one person with a gaze sharp enough to pierce the mask. Ayako's arrival is a countdown clock on Yukari's secret life, her presence a constant, loving threat. As her old friend's perceptive questions get closer to the truth, Yukari is pushed to the edge. Will she sacrifice her dark creation to save herself, or will Onu-chan's final, most daring performance be her own self-destruction?