Synopsis
The music video for GReeeeN's 31st single, "Hello Kagerou," was officially released on February 7, 2018. A shorter version of the video was uploaded to GReeeeN's official YouTube channel on January 11, 2018, to promote the full release and several campaigns, as the song serves as the official relay theme for Fuji TV's coverage of the 2018 Pyeongchang Olympics.