One day, as she's still adjusting to her new high school, Kasumi Toyama discovers a trail of stars that leads her to an old thrift store. Inside, she makes a discovery of a star-shaped guitar.
Kasumi's heart is set on forming a band, but Arisa wants nothing do with it. In fact, Arisa is so determined to avoid her that she puts the star-shaped guitar up for auction.
Kasumi starts staying after school to take guitar lessons from Tae. Meanwhile, Arisa seems to have a problem with all the time they are spending together.
Kasumi has a tall order in convincing Saaya to join Poppin'Party, is she able to do it? Meanwhile, they continue to get ready for the Culture Festival.