The Whole Starry Sky and Mirai's Memories.After making some mistakes in class in her pursuit for academic perfection, Riko studies diligently on how to play volleyball to make up for it. Later that night, after Mirai's father talks about how Mirai once got lost while stargazing in the mountains, Mirai takes Riko stargazing, stating it was seeing the stars that helped her not to be afraid when she got lost. They suddenly come across Spalda, who summons a Cloud Yokubal that grows larger from sucking up clouds. However, the Cures take advantage of the Yokubal getting slower as a result and defeat it, becoming treated with a starry view that grants them the Tanzanite Linkle Stone. The next day, Riko is encouraged to talk and play with her classmates more.