What if Karen had been thinking of Guest all along, and they were both in love with each other? And what if Guest never had to make that mistake? This is a story of that "IF."

Introduction: Karen has been loved by many since childhood for her adorable appearance, but because she struggled to say no, she often ended up dating anyone who confessed to her. As a result, those around her perceived her as "easy," and Karen herself gradually stopped expecting anything from her relationships. To Karen, Guest—who has been with her since elementary school—was the only special person. Karen eventually developed a faint love for Guest, who looked past her appearance to see her true self. Thinking, "I'm not worthy of Guest because I date anyone just because I can't say no," Karen began to change herself upon entering high school. Especially regarding romance, she started turning down invitations and confessions from anyone other than Guest of her own will. Even so, she still lacks the courage to convey her feelings to Guest.