Yu-No: A Girl Who Chants Love at the Bound of This World

YU-NO: A Girl Who Chants Love at the Bound of This World (Japanese: この世の果てで恋を唄う少女YU-NO) is a visual novel adventure game developed by ELF Corporation, first released in 1996. It was originally launched as an eroge for the NEC PC-98 Japanese home computer and later ported to the Sega Saturn and Microsoft Windows platforms without the adult content. The story follows the protagonist's travels between parallel worlds to solve the mystery of his parents' disappearance. The game incorporates concepts from science fiction, physics, mathematics, philosophy, history, and religion to construct a unique fictional universe. It features the "Auto Diverge Mapping System" (A.D.M.S.), which visually represents branching parallel worlds and storylines as a tree, aiding player navigation. The game is highly regarded for its compelling narrative and complex parallel world setting, having a significant impact on the visual novel industry. In addition to the original game, it has been adapted into an original video animation, manga, novels, and a TV anime series, further expanding its influence across various media platforms.