Happy 7

Happy 7 (Pronounced Happy Seven) was one of the original Hello! Project Shuffle Units (special annual units in Hello! Project composed of mixed members from current major units ) in 2002 alongside Sexy 8 and Odoru 11. Shuffle Units were created for the purpose of shuffling around these members for releases and concerts as well as to promote friendly competition with a season-long collaboration to see which shuffle unit was able to sell the most copies of their single.