Ignoring the heated battle for the fireworks that continues regardless of winter, Yuu and Aha took their first step into a new job. Meanwhile, Iori's career path is about to be decided. In the midst of this, a "dissolution declaration" is issued for the aging Tachibana Hall…! In the rapidly changing daily life, Konomi rushes out to convey her overflowing feelings. In the center of the accelerating romantic developments, Natsuno makes a decision in Volume 9! …Goodbye, Tachibana Hall!