In Episode 9 of "Yuzuki-san Chi no Yonkyoudai," the focus is on Gakuto Yuzuki, the youngest of the Yuzuki brothers.

The episode begins with Gakuto, a first-grader, revealing his secret plan to keep his class visitation day hidden from Hayato, who already has a packed schedule. Gakuto's concern for his brother's workload prompts this decision.

Meanwhile, Minato Yuzuki, a first-year junior high student and another one of Gakuto's brothers, accidentally discovers Gakuto's plan. Although they originally agreed not to do anything, Minato decides to attend the visitation, as he understands Gakuto's wish for his family to be present.

The episode then shifts to Hayato's perspective, a high school teacher unaware of the class visitation. He is shown discussing teaching methods with a colleague.

At home, the Yuzuki brothers prepare for the next day. Gakuto, feeling guilty about his secret, struggles with eating, while Minato also seems distracted, planning to attend the visitation.

The next day, Minato carries out his plan to skip school and attend Gakuto's visitation. He asks Uta, a friend, to help cover his absence. However, the plan fails when Hayato's colleague mentions the visitation, alerting Hayato to the event.

The episode culminates in the classroom, where the Yuzuki brothers surprise Gakuto. The family's presence overwhelms Gakuto, who feels guilty for causing trouble. The brothers reassure Gakuto, emphasizing their mutual support.

The episode ends with a reflection on the importance of family and understanding each other's feelings. It highlights the strong bond of the Yuzuki brothers and their willingness to support one another despite any challenges.