Raki, Aine and Mio are still at Four Star Academy with no idea how to return to Star Harmony Academy. Yume announces that she and Koharu are hosting an event for their brand Rainbow Berry Parfait, and invite Raki and the others to attend. Raki is thrilled at being able to see more dresses and quizzes Koharu about her designs. After watching Yume and Koharu perform, Raki admits that only person she has yet to see is Ako, so the three idols go to find her. Ako is busy filming a mermaid movie when some of the actors fail to show up. Luckily Raki, Aine and Mio make perfect stand ins.
ゆめが「レインボーベリーパルフェ」の定期公演をやるという話を聞きつけ、早速見たいと言い出すらき。らきはゆめと一緒にドレスを作ったという七倉小春から、ドレスに懸ける思いを聞く。そしてなぜか早乙女あこ主演のドラマの撮影に参加することに！？
