- Melodies of a lost promise

Park Sunghoon, now a successful K-pop idol, still holds the memory of Min Yunah, the enigmatic transfer student from his school days. When they first met, she was cold and distant, but their friendship slowly blossomed into something more. As Sunghoon's feelings deepened, he planned to confess to her, but on the day he was to meet her, she never showed up. Yunah vanished from school, and soon after, he learned she'd been in a terrible accident-leaving everyone to question if she was alive or dead.

As Sunghoon's idol career took off, the guilt of resenting Yunah for not showing up haunted him. He threw himself into his career, but the mystery of Yunah's disappearance lingered. Then, one day, in the halls of his entertainment company, he glimpsed a face he never thought he'd see again. It was Yunah. Where has she been? Why is she at the company? Sunghoon's heart races as he confronts a reality he thought was lost. What will he find out, and how will it change everything? The story explores the intricate threads of friendship, loss, and rediscovery against the backdrop of the high-stakes world of K-pop.