Sera Herami, a twenty-six-year-old woman desperate for approval, works as a maid at a café, often struggling with her mental health and anxiety as the oldest employee there. Her younger sister, Kira, is a nineteen-year-old idol whose cool, mature public persona has rapidly gained popularity. In private, however, Kira is obsessively devoted to her sister, constantly thinking of ways to cheer Sera up and help her through her emotional lows. The story follows the sisters’ intertwined lives as they secretly support each other while navigating their respective demanding careers, with an underlying goal of one day performing together on the same stage. The narrative blends comedy—often stemming from Sera’s gradual loss of sanity in her maid café role and her reliance on Kira for solace—with dramatic tensions introduced by other characters who attempt to manipulate the sisters. Their relationship carries a romantic undercurrent, and the series explores themes of insecurity, codependency, and the lengths siblings will go to protect one another.