Momo Takahara is a student of Maruyama High School's Performing Arts Program and an idol in one of Japan's newest big idol groups, A TO Z SIX. She also needs a change of pace after three straight years of hard work. Ryosuke Sakamoto is a stage and occasional screen actor and a fellow PAP student of Momo who wants to express himself musically through the keyboard and songwriting. After an encounter with General Education Program student and drummer aficionado Ai Inuyama, they are introduced to the complex and wild world of progressive rock, and together with fellow A TO Z SIX idol Sadako Takagawa, their guitarist, and fellow GEP student Masato Ushiyama, their bassist, they form the band Sweet Juliet.

However, Momo and Ryosuke get closer and closer by the day, and their relationship begins to raise uncomfortable questions. Additionally, Sadako harbors a secret that she fears may derail everyone's dreams. Will the band prevail, or will the prying eyes of the press destroy it?