Iori Himemiya

After Misaki and Jin graduated, a new student enrolled in the music department at Suiko. He became the resident of Room 103 after Jin left. He is the younger brother of Saori Himemiya, also known as Hauhau. Like Saori, he enrolled in the music department but quickly submitted a transfer request, catching the attention of the teachers. On the same day, he attempted to sneak into the girls' dormitory to peek into the girls' bath, leading to his exile to Sakura Hall on the day of the entrance ceremony. He desires to experience a youth like a romance simulation game. He has a preference for large breasts and evaluates girls based on their bust size. The headphones he owns were given to him by Saori and have the "HAUHAU" logo on them. He also understands the problematic nature of Shiorina after witnessing it firsthand.

He has the skill to win prizes in piano competitions, but being constantly compared to his talented sister has become a complex for him. As a result, he considers quitting piano to enjoy his youth instead of spending time practicing. However, he still loves piano and music, so he practices daily without fail.

In the first volume of the author's next series, "Rascal Does Not Dream of Bunny Girl Senpai," it is implicitly suggested that he has a good relationship with Shiorina.