Sana Kurata, a perfect sixth grader with a charmed life, is faced with a challenge - Akito Hayama, her troublesome classmate. Akito's disruptive behavior has become contagious, prompting Sana's female classmates and teacher to battle for order and productivity. Refusing to tolerate Akito's misbehavior, Sana takes it upon herself to uncover his motives in hopes of restoring normalcy to the classroom and relieving the teacher's daily tears. But as Sana delves deeper into Akito's world, she discovers that he may not be as simple as she initially thought.