Even though it is summer, the Princesses still have to cheer for sports teams and other clubs. Even Mikoto is called back for Princess work. As the princesses get ready, Sakamoto also accompanies them. As they are moving about, Toru has the creepy feeling that the Princesses are being watched.
Finally getting some free time, Toru and Yuujirou start with their summer homework. But they find some problems difficult to solve and so decide to go to Sakamoto's house to ask him for help (Sakamoto had invited them over earlier). they are also hopeful of meeting the famous older "Sakamoto-sama".
The Princesses have to put on a song and dance opening act for the choir group at their school, but there is one small problem: Mikoto cannot sing. During practice, Toru meets his cousin, who wants him to come back and marry her.