It was learned on February 28 that the popular band "THE YELLOW MONKEY" will be in charge of the theme song for the "UEFA EURO 2020 Soccer European Championship" which will be broadcast live on WOWOW. The theme song is "Balloon Balloon", which is included in the band's album "9999" released last year. Regarding the song, Kazuya Yoshii said, "This is a love song set in an old apartment in Europe. It is a song for people who are engrossed in their dreams and burn out with something. I'm thrilled just to imagine it flowing. "