Mimi Kitagami is the student council president at her high school, striving to become the ideal president by assisting classmates with personal challenges such as skincare, weight management, fashion aesthetics, romantic advice, confidence building, and social prioritization.

She maintains a popular and attractive image without vanity, prioritizing genuine self-improvement and helping others. A key responsibility involves managing the frequently disruptive MM3, three male students. They initially resist her authority and view her involvement as intrusive, but over time begin to appreciate her consistent efforts and the positive changes she facilitates, leading to a shift in their attitudes.

A pivotal aspect of her background reveals frequent physical fights during middle school, contrasting her current refined demeanor. She develops mutual romantic feelings for Ushio Toujou, the MM3 leader. Both conceal their feelings due to apprehensions about rejection stemming from perceived differences in personality and social roles, a dynamic that evolves gradually through their interactions.

The narrative spans multiple arcs reflecting extended periods, approximately six months each, tracking her ongoing duties, personal challenges, and the deepening complexity of her relationship with Ushio Toujou. Her development centers on perseverance in her presidential role, navigating interpersonal relationships, and balancing her personal feelings with her responsibilities.