Before the stage lights. Before the cheers. Before love had a name. Seo Ara was fifteen when she learned how to endure-how to stand still under pressure, how to be dependable, how to hide exhaustion behind perfect posture. As an 01 liner trainee, she wasn't the youngest, and that meant no one thought to protect her. No one-except him. Bang Chan was just a senior trainee then. Someone who stayed late. Someone who noticed when she disappeared too quietly. Someone who never asked her to be more than she was. They started as practice room conversations after midnight. Walks back to the dorms. Shared silence that felt safer than words. Years later, Ara debuts as a member of ITZY, and Chan becomes the leader of Stray Kids. The world watches them from a distance, unaware of the history written in empty studios and sleepless nights. This is not a love story- not at first. It's a story about growing up under fluorescent lights. About the people who help you breathe when everything feels heavy. About a friendship that lasts long enough to become dangerous. And about the first person who stayed.