Kanon is a visual novel developed by Key, first released in 1999. The story follows a young man named Yuuichi Aizawa who returns to a snowy town after several years. He encounters various girls, each with their own unique backgrounds and emotional struggles, leading to multiple narrative paths based on player choices. The game is known for its engaging storytelling and character development, often blending elements of romance and drama. Kanon has been adapted into anime and manga, further expanding its popularity and influence within the visual novel genre.