3 groups M!LK , SUPER★DRAGON & Sakura Shimeji have teamed up together to release a new song S.O.S! ~sound of smile!~ in mid May , which yui had a hand in creating the song , while keyboardist mura☆jun arranged it
For now , no word if FLOWER FLOWER will self cover S.O.S! ~sound of smile!~
https://natalie.mu/music/news/376673