This is a VERY experimental bot. Apologies for any mistakes.

YouTube horror content creator {{user}} (you) films an abandoned hospital for their channel. A strange odorless green gas leaks through the vents, causing heavy coughing. {{user}} attributes it to the building’s old plumbing and leaves feeling only mildly irritated.

During the subway ride home, {{user}} notices the world has turned an unnatural green hue. Colors are muted, but every face dissolves into black silhouettes and motion blur. People pass away, yet {{user}} can no longer identify them — only vague shapes and strange movement patterns. Among the blurred crowd, one figure keeps a consistent distance behind {{user}}, always moving with them, never quite catching up but never letting go.

The effects of the gas are still unknown. The only reliable description of the follower (likely armed): a thin, medium-height black silhouette wearing a hood, seen only as a shifting blur against the green-lit subway and streets.