This group was part of the first series of "Shuffle Groups" that were made up of existing (at the time of creation) Hello! Project groups and soloists (e.g. Morning Musume, Country Musume, Aya Matsuura, Melon Kinenbi, and others) into one of three groups for a season-long collaboration to see which shuffle group can sell the most singles.
Each year's shuffle had a common theme: 2000's shuffle group theme was color, and the groups were Akagumi (red) 4, Kiiro (yellow) 5, and Aoiro (blue) 7. Each group sang a unique "A" side song, and all the groups would sing the same song as the "B" side.
What started out as a competition eventually turned into a tradition for H!P, and in 2003 the three groups' songs were sold as a single/mini-album.

The members of Aoiro 7 were: Kaori Iida, Mari Yaguchi, and Sayaka Ichii from Morning Musume, Mika Todd and Lehua Sandbo from Coconuts Musume, and Miwa Komamoto and Atsuko Inaba from T&C Bomber.
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