Nao has secretly loved senior colleague Satomura for years—until she stumbles upon a cruel bet between him and other coworkers: "Can he actually make her fall for him?" Heartbroken but defiant, she plays along, accepting his "fake" confession to enjoy a no-strings romance. But as lines blur between the game and real feelings, Nao faces a dangerous question: Is she still pretending... or has the gamble become all too real?