"Mashiro no Oto", "Your Lie in April", "THE BAND" ── The forefront of music Manga presented by Monthly Shonen Magazine!! On the coast of Hakodate, a girl named Itsumi, who plays the Trumpet she learned from her grandfather alone, encounters "Real Jazz" in Tokyo for the first time! Then, the stage moves to high school. Together with the comrades of the Jazz club she started herself, they aim for the world from the port town!!