The girl's search for the Sagittarius Color Pen leads them to an auction on Planet Zenny, which they manage to attend thanks to an invitation by space idol Mao. When the pen is put up as an auction item, Madoka uses donuts brought in by Pruns as currency to win the audition. However, the pen gets stolen by Mao, whose true identity is revealed to be that of the space phantom thief Blue Cat. When Eyeone appears with another Notrigger, Blue Cat decides to give the pen to Madoka so the Cures can defeat it and revive the Sagittarius Star Princess.

Learning from Lolo that there is a Princess Pen on Lala's home planet of Saman, the girls begin heading there but are unable to warp all the way due to Fuwa being too tired. Needing to rest for the night, Hikaru decides to hold a pajama party with everyone. While getting to learn about each other during the party, they discover an alien named Yanyan has snuck aboard. Kappard attempts to use Yanyan's anger to power his weapon, but the Cures manage to defeat him. With the rocket too damaged to warp, Yanyan offers to take the girls to her planet to repair it.

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