Shinka decides to run for student council president. Due to Sanae's constant interference, Shinka convinces Yūta to keep Sanae at bay, but Sanae still manages to escape and pranks Shinka during her candidacy nomination speech in a classroom. At a restaurant, Yūta, Rikka, Shinka, Kumin and Sanae chance upon Satone, who reveals that she attended the same middle school as Shinka and knew Shinka very well as Mori Summer. The next day, Sanae is convinced that Shinka is the genuine article and starts acting more polite and affectionate towards Shinka. In fact, Sanae begins assisting Shinka with advertisements for her election campaign. When Shinka invites Sanae over to her home, Sanae shares her baked cookies, prompting Shinka to don her Mori Summer outfit in front of Sanae, much to her amazement. On the day of the election campaign speeches, Shinka's reputation backfires when Sanae reads from the Mabinogion as an endorsement speech and shows an image of Mori Summer on the projection screen. As such, Shinka fails to get elected and Sanae goes back to believing that Shinka is a fake, bringing their relationship back to the status quo.