We become "us" as five. Having overcome various trials, the members of Roselia have vowed to perform at FUTURE WORLD FES. And now, the season has turned to autumn. Lisa, who has grown through writing the lyrics for "Yakusoku." Yukina and Sayo, who go out to view the autumn leaves and write picture letters to their future selves, filled with determination. Rinko, driven by the desire to do something for Roselia, begins composing a new song. "The remaining quests are the contest, the tournament... and FUTURE WORLD FES. ..." Ako, who starts thinking about their goal and suddenly feels uneasy. What is the scenery that the five of them saw beyond FUTURE WORLD FES.—