Who we once were

Kang Siwoo enters university, desperate to shed the skin of his past self. He carries the heavy weight of his middle school sins, a complicit role in hurting Chaerin alongside his former savior, Haruto. But the past isn't so easily buried. Old faces resurface - Chaerin, now a phantom of her former self, and Taehyun, the boy who once orbited Haruto's dangerous charisma. A woman with an unsettling obsession fixates on Siwoo, threatening to unravel his fragile new identity. Meanwhile, thousands of miles away, the enigmatic Haruto, haunted by his own dark history and pursued by three powerful, yandere women, contemplates a return to Korea, setting the stage for a collision that will force Siwoo to confront the monster he once was and the man he's desperately trying to become. The echoes of who they once were refuse to fade.