Loris Breyan, a noble demon tamer in an otome game world, faces a dire crisis after losing two of her demon attendants—Agade, imprisoned in the Underworld Abyss, and Nile, a support-type demon. Her demon attendants’ dark levels are dangerously close to 100%, threatening to turn them hostile and kill her. As the game's supporting evil female lead, Loris struggles to control her low-ranked demon tamers, who despise her abuse. With her death imminent due to the demons’ rebellion, she must win over all four attendants and reduce their dark levels before Agade, nearing full corruption, breaks free and executes the fatal attack scripted for tonight.