After completing her six-year witch training, Nico Wakatsuki returns to town solo, tasked with selecting a familiar to accompany her. Opting for an unconventional choice among witches, she picks Morihito 'Moi' Otogi, her childhood friend who happens to be an ogre. Reluctant at first, Morihito yields to her request upon realizing that disobedience would transform him into a bizarre cow-tiger hybrid due to a curse. With Morihito's father away on business and Nico's mother residing in the Witches' Holy Land, the two adolescents find themselves cohabiting. While Nico revels in living with her crush, Morihito grapples with her magical mishaps and general clumsiness that often lead to more trouble than resolution. As a looming prophecy foretells Nico's impending calamity, Morihito steps up as her guardian and familiar, safeguarding her while balancing his dual roles.