Sawamura Yuka, student council president at a certain school, is a bright, diligent, kind, and highly principled girl with a strong sense of justice. Every day she protects timid salarymen from delinquents, making her a beloved and approachable figure to everyone. By a twist of fate, she receives divine powers that transform her into Magical Pretty Warrior Fontaine, secretly tasked with correcting those who walk the path of evil. Constantly striving to eradicate hidden wrongs in everyday life and protect the peace of her school, she dedicates herself to her mission without hesitation.