After Airi's declaration the previous day, a gloomy atmosphere develops among the Kagamidai students. Shingo realizes that Airi is the only one who can change the current mood at the school. Angelina likes the idea of there being more students around to serve, and one of Angelina's friends, Sana Inui, is also for the student transfer. Shingo makes several mistakes while at school, such as walking into one of the bathrooms with Airi inside, or opening the door of a classroom where girls are changing back into their school uniforms after gym class, which infuriates Airi. During lunch, Shingo meets Miu Amaha, a friendly third-year student who is looking after a strange cat-like creature she has named Pannya. Since there is still much opposition about the male students attending, the principal has them take classes in cooking, learning music, preparing tea and flower arrangement.

Angelina goes with Shingo and Sakuno back to their house, only to find they have all the household chores covered. Sakuno and Angelina both cook a meal for dinner, and Angelina tries to be as helpful as possible to Shingo later on. Shingo joins the Nuko Club and assists Sana posting member recruitment posters around the school. That night, the principals comes to tell Angelina the student council president is having a hard time without her, and Angelina happily returns to the academy, though she still considers Shingo to be her master. The recruitment posters are taken down and most of them are burned. To help save the Nuko Club, Sakuno and Angelina join and help in the recruitment of a sixth member, which would save the club from abolishment. Shingo and Airi get wet from the rain on the way home, and Airi suggests Shingo come to her apartment to get an umbrella. Airi wants him to take a bath before he leaves, though Shingo is reluctant to take one before her.

Angelina, Airi and Sakuno see what they think is Pannya around town, but soon realize that it was in fact Pannya's mother. The Nuko Club members go to where Miu first met Pannya and see Mamanya (Pannya's mother) and another smaller Pannya-like animal with her. The club members realize they have to let Pannya go back to its family, though this weighs heavy on Miu most of all. Airi is inspired by Miu, who can still smile despite having to give Pannya up, to help the school merger succeed, and organizes a student rally for the cause. Miu tries to be overly happy towards Pannya, but breaks down in the club room and cries on Shingo's shoulder. After talking with her mother, Miu finally resolves to let Pannya go back to its family. The club members go to the forest clearing where Miu met Pannya and it is reunited with its family after the club members say goodbye. Time passes, and in the spring the school merger has been completed. After Miu graduated, Sana becomes the club president.