Twins Disturb

First-year high school student Souta Ogiura is charmed by the student council president, Chika Kisaragi, during her speech at the entrance ceremony. Unfortunately, Chika confuses the event with a graduation ceremony, which leads Souta to correct her in front of the entire student body. Chika thanks Souta for pointing out her mistake, stirring his emotions even further.

While trying to navigate the school, Souta bumps into the airheaded Chika again. Desiring to confess his feelings right then and there, he is interrupted by the unexpected appearance of Chika's twin sister named Rika. When Chika asks Souta to meet her on the school rooftop the next day, something seems strange, compelling him to confront her about it.