The PoMPoMs, who started their Cheer Delivery service, receive a request from Banka Rara, the captain of the Omaebashi High School Cheer Committee. The request is to help support the baseball team, which has made it to the quarterfinals of the prefectural tournament.

After the baseball support was broadcast on the news, the PoMPoMs received a flood of requests for support. The PoMPoMs sincerely tackle each request one by one, steadily making progress. However, overwhelmed by the sheer number of requests, everyone begins to feel exhausted.

Mari has disappeared, and Kanata and the others go to look for her. After discovering her problem, they decide to cheer her on.