It is highly likely you are referring to "Kaam Mann," "Kaar," or perhaps confusing the title with the popular horror series "Kaun?" (which released earlier) or the 2024 Ullu series "Man" (Part 1 & 2).
Ullu has been criticized for formulaic plots (e.g., "nurse-scandal" or "boss-secretary" tropes). Kaun Man breaks that mold in three significant ways: Kaun Man -2024- Ullu Original
Episode 1 – "The Midnight Visitor"
Avni wakes up gasping, clothes disheveled. She describes the masked man in vivid detail: tall, silent, with a porcelain mask—one side crying, one side smiling. Rohan calls her delusional. That night, he hides a 4K camera in the bedroom. It is highly likely you are referring to
Introduction: The Rise of a New Cult Classic She describes the masked man in vivid detail: