Saya no Uta is a visual novel developed by Nitroplus, released in 2003. It follows the story of Fuminori Sakisaka, a medical student who perceives the world as grotesque and distorted after an accident, except for a mysterious girl named Saya. The narrative explores themes of horror, love, and the boundaries of sanity. Known for its psychological depth and disturbing content, it has gained a cult following among fans of dark and mature storytelling.