TV-Series
Description
Hiroki Komachi is a main character and the primary male student in the anime Chu-Bra!!. He is a middle school student with blonde or yellow hair and yellow eyes, placing him in the teenage age range.

In terms of personality, Hiroki is characterized as a boy who easily becomes embarrassed or flustered at the sight of underwear. This trait is particularly tested because his classmate, Nayu Hayama, speaks about undergarments very openly and casually, which often causes his face to turn red. Despite his shyness and tendency to be easily flustered, he is not presented as a lecherous character; within the context of the series, he and Nayu's stepbrother are portrayed as the only sympathetic male characters, in contrast to a school population otherwise depicted as thinking largely with their libidos.

Hiroki's primary motivation is rooted in a long-standing academic rivalry with Nayu. Since elementary school, he has consistently earned second place in school rankings, with Nayu always taking the top spot. He considers her a significant challenge and rival, though this rivalry is entirely one-sided, as Nayu does not seem to be aware of his existence in that context. Beneath his competitive and easily-embarrassed exterior, he seems to harbor a small crush on Nayu.

Within the story, Hiroki initially has a bitter past that makes him hesitant, but he ultimately decides to help Nayu despite this. His role becomes more defined as he joins the Underwear Club, becoming its sole male member and serving as a representative of the male student body. He is also noted to be the class president of the class next to Nayu's. His involvement in the club is a key step, as it places him in a supportive environment to learn and grow, directly confronting his own anxieties.

A key moment in his development involves an ironic echo of one of Nayu's statements. He once repeats her line about how sexy underwear is impractical, only to quickly become aware of the nature of what he just said, showing his gradual, if awkward, assimilation of the club's pragmatic discussions. His primary notable ability is his academic prowess; he is a high-achieving student who consistently holds the number two rank in his entire school.
Cast