Welcome to the set of Lonelygirl15, the breakout Web hit that, in September, was unmasked by fans as a work of fiction. What nearly a million people thought was the room of a sweet, charismatic teen named Bree is actually the Beverly Hills bedroom of Lonelygirl15's cocreator Mesh Flinders, an unshaven 27-year-old who is fighting the flu and running a fever of 101. He hasn't left this room for more than 24 hours. "I've got no reason to leave," Flinders says, rubbing his bloodshot eyes and then blowing his nose. The room smells like sweat. "I write the scripts here, we shoot them here, and I sleep here. Why leave?"