A single song stretched into four minutes of visual poetry about what it costs to love someone you can't save. YOASOBI's production doesn't just underscore the video; it is the emotional core, each synth line and vocal break landing exactly where the image needs it to. You watch a relationship dissolve in real time and feel it the way the song makes you feel it, not a second faster or slower. That kind of synchronization between sound and image doesn't happen by accident. This is what happens when a director and a musician speak the same language.

Halzion is a single-episode music video made for the YOASOBI song of the same name, with direction by Toshitaka Shinoda. Its genre labels are psychological and romance. The video exists in two versions: the original, set to the Japanese song, was released on May 11, 2020, and a second version, set to the English-language recording also called Halzion, followed on November 18, 2022.