 Their official fan club is named 

Mizuno has the most number of composed songs among them, while Yamashita ranks second.Yoshioka has contributed lyrics to a few songs, but "Namida ga Kieru Nara" is the only song on which the three of them have collaborated.In 1989, Mizuno and Yamashita met by chance while they were in the first grade; they were both put in charge of being , who are caretakers of the school's plants and animals.