With one exception, the septuplets of the Otagami family are considered genius pianists. As they grow up, the family separates, and only Lucky, the mediocre sibling, goes to live with his sickly mother rather than perform alongside their talented father. As time passes, Lucky promises his dying mother to become a pianist, but how will someone regarded for so long as talentless achieve success?

Lucky takes part in a music audition put on by Wao Niiza. At the venue, he performs “Ode to Joy” for his classmate Rokku Maki, hoping that his music will grant Rokku’s wish. But Lucky is also competing against his brother Reijiro, whose titanic sounds will prove quite the challenge to beat!

Mimin plans to dominate every competition in Japan so that no one can ever again tell her how she should play the piano. But Lucky and friends are determined to stop her, so they go on a retreat to strategize. Their plans go awry, however, when Mimin unexpectedly shows up!

The four-on-four piano battle begins with Reijiro’s victory! Things take a turn for the worse in the next round for Lucky’s team, however, as Meloli comes up with a devious plan to make Mimin hate the piano. Can Mimin overcome her confusion and make a comeback?!

Lucky’s trying to win against Mimin Otogami by gaining more experience, but when he arrives at the concert hall, he’s surprised to see Sorachika! Meanwhile, Meloli wants to protect her world, but to do so, she must…

Sadame follows the sound of music to a church. After his conversation with Sorachika Otogami about Lucky, his desire to learn the piano increases. Meanwhile, Lucky finally confronts Gakuon, who left Lucky behind because of his mediocre piano skills. Find out what’ll become of Lucky in the exciting final volume!

Lucky’s trying to win against Mimin Otogami by gaining more experience, but when he arrives at the concert hall, he’s surprised to see Sorachika! Meanwhile, Meloli wants to protect her world, but to do so, she must…

The four-on-four piano battle begins with Reijiro’s victory! Things take a turn for the worse in the next round for Lucky’s team, however, as Meloli comes up with a devious plan to make Mimin hate the piano. Can Mimin overcome her confusion and make a comeback?!