The narrative follows y/n, a headstrong girl from a working-class family who attends Eitoku Academy, a prestigious school for the ultra-wealthy. The school is ruled by the F4 ("Flower Four"), a clique of four incredibly rich and handsome boys—Tsukasa Domyoji, Rui Hanazawa, Sojiro Nishikado, and Akira Mimasaka—who bully anyone that crosses them. After standing up to the group's leader, Tsukasa, to defend a friend, y/n is targeted with a "red card" (a signal for the entire school to harass her). Instead of backing down, she declares war on the F4. Her resilience eventually earns the respect and affection of the arrogant Tsukasa, leading to a complex love-hate relationship complicated by social class differences and the disapproval of his powerful family