In this episode, everything revolves around Umika, the chairperson of the Rocket Research Club at Tatsuoka High School of Science and Technology. She struggles with her responsibilities, especially in light of her admiration for the impressive club president, Kei Akizuki. Umika's challenges become apparent during a meeting of the club presidents, where she is supposed to present her group's goals. Despite her nervousness and initial difficulties, she manages to clearly outline the group's objectives, including the ambitious announcement of winning a model rocket competition.

Matataki plays a key role in leading the team. She informs them about the need to acquire a model rocket license in order to participate in the championship. Matataki demonstrates her expertise and guides the group through the process of obtaining these licenses. Each member faces a challenge, but thanks to Matataki's strict yet effective guidance, they eventually succeed.

The group surprises Matataki with a belated birthday celebration featuring a cake buffet to honor her contributions. During the outing, a heartfelt conversation takes place between Umika and Akeuchi. Akeuchi shares his perspective on Earth and expresses his desire to explore more under Umika's guidance.

Umika reflects on her role as president and her wish to be more like Akizuki-san. She realizes that winning the championship is a collective effort and that they cannot rely solely on Matataki's expertise. This leads to a pivotal moment where she demonstrates her leadership skills and expresses her desire to build the best rocket as a team.

At the end of the episode, the group prepares for the championship with renewed energy and a shared vision.