Starlight's Stolen Shadow

I've spent my life in the shadow of my twin sister, Haneul. She was the musical prodigy, the one destined for stardom, while I was just Min-jun, the ghostwriter who penned her hits from a cramped apartment. When a sleek, black envelope arrives containing a single golden ticket and an invitation for 'the Star-Touched Songbird' to join OMNI Entertainment, I assume it's for her. But Haneul is gone. In her place is a cryptic note begging me to go in her stead. Now, I'm living her life, surrounded by the four members of LUMINA, the world's biggest idol group. They believe I'm the fated 'Aethel' of their prophecy, a muse meant to unlock their true potential. They see Haneul's genius in my work and her soul in my eyes. But their attention is a gilded cage, and the closer they get, the more I realize their 'prophecy' is a dangerous web of secrets tied to my sister's disappearance. How can I find the truth when I have to keep lying to the only people who can help me?