The white devil and the black angel clash fiercely. With the future of Class 4-2 at stake, two beautiful girls finally face off! Noroze-sensei, the homeroom teacher of Class 4-3, is determined to help Yuu, who has been turned into a "puppy." She works hard to save her. However, on the day of the choir competition, an unbelievable event occurs right in front of everyone. At that moment, someone stands up... Will a ray of hope shine on Class 4-2? The solitary battle of a girl begins.