Yotsuba, who was saved by her sisters in middle school, swears to hide her feelings for Futaro for her sisters' sake. In addition, Ichika takes a leave of absence from school in order to further her acting career … But after their tumultuous summer ends, the new school term begins, setting the stage for the final event of their high school lives: the school festival!

Volume 12 of the The Quintessential Quintuplets manga series by Negi Haruba.