The band "given"—made up of Ritsuka Uenoyama, Mafuyu Satou, Haruki Nakayama, and Akihiko Kaji—has moved on to the final round of the Countdown-fes Amateur Contest, where their live performance will be evaluated. While they are eager, they are concerned about having just one original song to play. Mafuyu welcomes the chance to learn more about music so he can write new songs that carry emotional weight. In this process, he gets unexpected assistance from Ugetsu Murata, Akihiko's on-again, off-again partner. Ugetsu has failed to move on from Akihiko, who is himself caught between lingering feelings for the past and an uncertain determination for the future. As the contest approaches, Haruki starts to question his role in the band and the trust he has with Akihiko, which is out of character for him. It is a given that not all bonds last forever, but it remains to be seen what can be saved from the wreckage of heartbreak—or if only regrets will remain.