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The story of the second season continues with Laala and her friends Mirei and Sophy, who are part of the "SoLaMi♡SMILE" PriPara idol unit, which is rising in popularity. In the PriPara amusement park, a new zone called "Dream Theater" has opened, and it's said that when a fateful five-man team filled with charm that performs there, a new event called the "PriPara Dream Parade" will be held. However, it is not known which five people make up this team, and the PriPara idols scramble give the greatest performance in the new zone.
One day, a huge UFO suddenly appeared above the PriPara town. While hovering, in addition to lots of shiny jewels, a mysterious baby also descended from the UFO and immediately started calling Laala "mommy."