Once revered as the second-in-command in the Demon Realm, Jahy wielded power through intimidation. However, a magical girl's assault shatters a crucial gem, leading to the realm's downfall. Surviving the catastrophe, Jahy is stripped of her abilities and exiled to the human world in a diminutive form. To reclaim her strength and revive her realm, she must locate scattered gems amidst the challenges of mundane existence. From navigating the intricacies of a part-time job to wrangling with her irksome landlord over overdue rent, Jahy refuses to be daunted on her quest for restoration.