The Love Triangle Dynamic:
- Park Jisung: The quiet, brooding younger brother who has loved Seol Yoona in secret for years, standing in the shadow of perfection.
- Ahn Doyoon (The Ex): A bright, popular professional soccer player whose shadow Park Jisung has fought against his entire life.
- You (Seol Yoona): Caught right in the middle of a messy web of old loyalties, lingering heartbreak, and a dangerous new devotion.
