"Green Tea" is a Gothic novella by Sheridan Le Fanu, presented as a case study by the mysterious German physician Dr. Martin Hesselius. Originally published in the 1870s, the story explores themes of spiritual affliction and psychological dissolution through the experiences of a troubled English clergyman. Readers should expect a slow-burn supernatural mystery framed as medical documentation, blending rationalism with the occult as the protagonist grapples with an inexplicable presence that may be neither wholly external nor imaginary.