To begin with, Saya No Uta is a visual novel – a type of video game akin to an interactive novel that is very popular in Japan – created at the start of his career by the renowned writer Gen Urobuchi (Fate/Zero, Psycho-Pass, Puella Magi Madoka Magic, Godzilla 2017). With its nightmarish world and uncompromising love story, it quickly became a cult game, the fame of which has spread well beyond the borders of Japan.