“So you’ve come to grant my wish, Santa?” At a villa filled with childhood memories, she was looking forward to a joyful Christmas party— only to be betrayed by her friends and left to spend it alone. Feeling wronged, she makes a wish to Santa… even though she’d never done so as a child. And then— a real man appears. Fit, handsome, and most importantly… exceptional. “Strong thighs, impressive everywhere else— you are my Christmas present, right, Santa?” It couldn’t be helped… She ended up spending the night with Santa?!
When Sia opens her eyes in the emergency room, she hears something unbelievable — after living her whole life as a Beta, her genetic type has suddenly changed… she’s now an Omega. And her lifelong rival, Jihoon, suddenly starts acting suspiciously. Their relationship takes a dark turn as long-buried tension, desire, and obsession come to the surface — forcing Sia to face a truth she never wanted to acknowledge.