A girl who can't cast a single spell right summons a regular Japanese teenager instead of the magical beast she desperately wanted. What makes this work is that neither of them wants to be stuck with each other, and the show treats that friction as genuinely funny instead of tsundere window dressing. Louise's humiliation and Saito's bewilderment aren't cute, they're the actual setup, and the comedy lands because both characters resent the situation before anything romantic happens. The ecchi moments feel earned rather than grafted on because they emerge from two people who would rather be anywhere else constantly forced together. The show's real strength is understanding that the best romance starts from a place of mutual annoyance, not instant chemistry.

Louise has spent her time at Tristein Academy earning a humiliating reputation. Her magic always backfires, earning her the nickname "Zero Louise" and making her the target of her classmates' mockery. When the academy requires students to summon a familiar, a magical servant bound to aid them, Louise hopes for one that will outshine those who tease her. What appears from her summoning is Saito, an ordinary Japanese teenager. Neither wants this partnership, but the ritual cannot be undone. Louise can't attempt another summoning. Saito can't go home. Stuck with each other, the two begin an awkward life together in a fantasy comedy full of action, romance and ecchi humor.