Kaoru Kizaki is a second-year student at Geika Institute of Fashion specializing in women's fashion design. She harbors deep admiration for designer Hajime Yanagida, having assisted as a dresser during his debut fashion show, which profoundly shapes her career goals and creative vision. Her enduring friendship with childhood companion Ryuunosuke Eda, a fellow Geika student, offers steady personal support throughout her pursuits.

Kaoru's first encounter with Ikuto Tsumura ignites a one-sided rivalry. Witnessing Ikuto improvise alterations to Yanagida's dress for Chiyuki Fujito during a critical moment, she grows resentful of his rapid entry into Yanagida's studio, viewing it as an unearned advantage. This fuels her determination to surpass him.

Her competitive drive peaks during the Geika Fashion Show preliminaries, where she publicly challenges Ikuto, vowing to outperform him and undermine his reputation. This ambition reflects her hunger for recognition within the institute's demanding landscape. Focused squarely on women's fashion, Kaoru competes directly against Ikuto and peers in the preliminaries, crafting stylish ensembles for scaled-down dolls.