At the renowned Shuchiin Academy, Miyuki Shirogane and Kaguya Shinomiya are the student body's top representatives. Ranked the top student in the nation and respected by peers and mentors alike, Miyuki serves as the student council president. Alongside him, the vice president Kaguya—eldest daughter of the wealthy Shinomiya family—excels in every field imaginable. They are the envy of the entire student body, regarded as the perfect couple. However, despite both having already developed feelings for the other, neither are willing to admit them. The first to confess loses, will be looked down upon, and will be considered the lesser. With their honor and pride at stake, Miyuki and Kaguya are both equally determined to be the one to emerge victorious on the battlefield of love!

After a slow but eventful summer vacation, Shuchiin Academy's second term is now starting in full force. As August transitions into September, Miyuki Shirogane's birthday looms ever closer, leaving Kaguya Shinomiya in a serious predicament as to how to celebrate it. Furthermore, the tenure of the school's 67th student council is coming to an end. Due to the council members being in different classes, the only time Kaguya and Miyuki have to be together will soon disappear, putting all of their cunning plans at risk. A long and difficult election that will decide the fate of the new student council awaits, as multiple challengers fight for the coveted title of president.

The elite members of Shuchiin Academy's student council continue their competitive day-to-day antics. Council president Miyuki Shirogane clashes daily against vice-president Kaguya Shinomiya, each fighting tooth and nail to trick the other into confessing their romantic love. Kaguya struggles within the strict confines of her wealthy, uptight family, rebelling against her cold default demeanor as she warms to Shirogane and the rest of her friends. Meanwhile, council treasurer Yuu Ishigami suffers under the weight of his hopeless crush on Tsubame Koyasu, a popular upperclassman who helps to instill a new confidence in him. Miko Iino, the newest student council member, grows closer to the rule-breaking Ishigami while striving to overcome her own authoritarian moral code. As love further blooms at Shuchiin Academy, the student council officers drag their outsider friends into increasingly comedic conflicts.