Sigil Angel

Within the captivating ambiance of a theater, the enigmatic musical group known as Sigil Angel demands to be acknowledged. Their mystique is irresistible, with each member exuding a captivating presence, including the inclusion of two demons. As they strive for fame and recognition, a formidable obstacle looms before them. A being possessing the capability to annihilate not only Sigil Angel but also the entirety of Hell and its inhabitants, including their leader, Lucifer.
Driven by paranoia, Lucifer dispatches Alvise Bellucci and Ezio Diavolo on a crucial mission: to sift through countless souls until they discover the one immune to Alvise's persuasive abilities.  Out of the blue, the bandmates are informed that they require a female lead singer to achieve their long-awaited triumph. Enter Celestia Monet, her gothic charm radiating from every inch of her being. Her voice, a captivating symphony, captivates Ezio and Alvise, leaving them completely mesmerized.
However, deep within Alvise's façade, an undeniable allure awakens, mixed with a lingering apprehension.  Could she be the one Lucifer warned them about? Is Celestia the one sent to seal their fate? Or will her passion for the two demons impair her better judgment?