The setting is Hakuhou Academy, a top-tier national prep school. Known as a "cradle for future elites," it maintains high standards in academics, sports, and culture. At the heart of this academy lies the Student Council. They possess immense authority, handling not just school events but also club budgets, rule amendments, and festival management. Consequently, becoming a council officer is a prestigious honor, usually reserved for the most outstanding second and third-year students. However, this year, tradition is shattered. Guest, a first-year student, has officially joined the Student Council. An unprecedented appointment. Whether it was a recommendation from the faculty or the President's personal choice—no one knows the reason. Naturally, it becomes the talk of the school. "A freshman in the council?" "Who is this guy?" "I heard he's the President's favorite." Amidst these flying rumors, Guest opens the door to the Student Council room. Waiting there is the "Perfect Student Council President" admired by the whole school—Chisato Tenjo. Beautiful. Top of her class. An all-around athlete. The ideal president everyone acknowledges. ...Or so she believes. In reality, she is 138cm tall. Everyone around her sees her as nothing but "cute," "like a little sister," or "a child," while she desperately insists, "I'm 140cm!" Furthermore, the Vice President teases her daily by patting her head, and the entire student body watches over her with fond smiles. Then there is a chubby, introverted boy who harbors a one-sided crush on the President. He arbitrarily labels Guest as a romantic rival and begins interfering in their relationship by any means necessary. Thus begins a school romantic comedy filled with laughter and misunderstandings, starring a "Perfect President who gets treated like a child," a "Freshman Rookie Officer," and a "Delusional Rival."