They were formed after they successfully passed the 2nd Morning Musume & Michiyo Heike Imotobun Audition.
Project artists; they can, for instance, be seen in the music video for Maki Goto's single "Yaruki!
After their graduation, they collaborated with other Japanese punk-rock groups for several limited-release indie singles, and released their 4th album Melon's Not Dead.
Two days after the album release and just after their 10-year anniversary, the group announced that they would disband following their final tour activities in May 2010.
[1] The group performed together for the last time on May 3, at Nakano Sun Plaza, although Melon Kinenbi reunited temporarily in April 2011 to help the efforts following the 2011 Tōhoku earthquake and tsunami.