At Tristain Academy, Louise Françoise le Blanc de la Vallière is infamous among her peers as “Louise the Zero” due to her constant magical failures. During a pivotal summoning ceremony meant to reveal each student’s magical companion, Louise shocks everyone — not by her success, but by summoning an ordinary boy from modern-day Japan. Though he’s no magical beast, the pact is sealed, and the two are magically bound as mistress and familiar. Forced into an unexpected partnership neither asked for, the chaos begins. Sparks fly, tempers clash, and an offbeat romance slowly weaves itself into their bizarre magical misadventure.