The "Nth Room" case is a criminal case involving blackmail, cybersex trafficking, and the spread of sexually exploitative videos via the Telegram app between 2018 and 2020 in South Korea. A man nicknamed God God sold sexual exploitation videos on Telegram channels and groups.

A copycat crime, known as the "Doctor's Room", was operated by a man using the screen name Doctor, who is accused of blackmailing dozens of women, forcing them to take sexually exploitative videos, with some involving rape