Leni, a young witch born to a human father and a demon mother, became separated from her mother when the Demon King was slain by a hero. While seeking her mother, Leni gets caught for a dine-and-dash incident and is handed over to the church. She tries to make her escape by casting a spell on a Sister, Camille, but the nun has a resistance to magic...!? A young witch meets a motherly Sister—a heartwarming comedy!