Momoko navigates the peculiar pressure of living in her accomplished older sister Sakura's shadow. While Sakura climbs the corporate ladder at her office job, Momoko struggles through high school with the weight of constantly being compared to her sibling's success. The gap between them stretches wider each day, forcing Momoko to question who she is beyond being "Sakura's little sister." What unfolds is a comedy about the messy, unglamorous reality of growing up female in modern Japan. Momoko and her circle of friends encounter the small humiliations and unexpected victories that define adolescence: romantic missteps, academic struggles, social anxieties, and the occasional triumph that feels monumental in the moment. Sakura, meanwhile, discovers that adulthood presents its own minefield of workplace politics and personal compromise. The show finds humor and heart in the ordinary conflicts that shape young women's lives. It's honest about the insecurity that comes with comparison while celebrating the bonds between sisters and friends who refuse to let society's expectations define their worth.