Yuuichi Kudou is a male honor student known for his distinct lack of self-control, especially during emotional moments. His defining characteristic is frequent, intense nosebleeds triggered by his intense crush on fellow student Suetake, earning him the nickname "the nosebleed king" among classmates.

Yuuichi is gay, with his romantic feelings focused solely on Suetake. These emotions fuel vivid romantic fantasies that constantly distract him. Despite the intensity of Yuuichi's attraction, Suetake remains entirely unaware of his feelings. This obliviousness contrasts sharply with their classmates, who witness Yuuichi's infatuated behavior and react with familiar exasperation and eye-rolls.

His unrequited pursuit parallels Rio Kitagawa's persistent advances toward Mika within the narrative. However, a key difference exists: while Mika recognizes Kitagawa's feelings but struggles to deter her, Suetake operates in complete ignorance of Yuuichi's attraction. Classmates view Yuuichi's actions through the same lens of frustrated familiarity as they do Kitagawa's pursuits.

Yuuichi's narrative function centers on comedic escalation arising from his unsuccessful management of his emotions. His background remains confined to his status as an honor student and his romantic preoccupations.