When Koyuki accepts Ryusuke's invitation to see his band perform live, he unwittingly sets down a path of self-discovery. But what Koyuki finds both disturbs and intrigues him, as the youngster uncovers the best and worst aspects of human nature. And though his world begins to expand, self-doubt and uncertainty threaten to send it collapsing in on itself.

Ryusuke's been bothered by Erica Blige's death and often checks the news. At school, Saku and Koyuki form a band for the cultural festival with Tanabe and a bassist. Tanabe names the band Ciel Bleu. Hyodo tries to ruin Ciel Bleu's practice.