Marginal#4, a newly emerged idol group, aspires to deliver their kisses all the way to the edge of the cosmos. Marginal#4, made up of Atom Kirihara, Rui Aiba, and the twins L and R Nomura, aspires to be the top idol group in Japan, following in the footsteps of Pythagoras Productions' previous idol group, Lagrange Point. When they aren't performing, the lads of Marginal#4 are just like any other high school student. Their days are jam-packed with varied shenanigans, from getting a club room to tracking down misplaced undergarments to filming advertisements. As the lads negotiate a whirlwind of events, they attempt to become shooting star superstars and win the hearts of their admirers, known as Starclusters.