Hanadoki wo Kakeru 

Satsuki is a clumsy boy who can't seem to do anything right. There are days when he hates his life, and the only time he feels happy is when he can be himself singing and dancing in private. One day the popular idol Minami happens to see Satsuki dancing and approaches him. The gorgeous Minami tells Satsuki, "You should become an idol!" It's a story of idol x friendship x life reversal! (Source: Hakusensha, translated) Note: Chapter count includes an additional one shot Glukan (グルカン)