Yutaka Shinozaki

As the devoted older sister of Takuma, this charming woman shares a deep, playful bond with her younger brother, characterized by both childhood squabbles and endless affection. Driven by an irresistible weakness for everything small and adorable, she unexpectedly falls for Shiori, Takuma's coworker. Her ultimate goal is to see her brother happily married, primarily because such a union would allow her to officially become Shiori's new big sister.