Ema, who has an American father, works at a cosmetics company developing products that support women's beauty. Despite her busy schedule, she diligently maintains her skin and figure, always striving to be the ideal woman her customers admire. One day, she came across a research paper stating that women in romantic relationships naturally become more beautiful. Intrigued by the idea that love itself enhances beauty from within—not just through fashion, makeup, or hairstyles—she began a comparative study between women in relationships and those who weren't. The results showed that women in love had better skin texture, hydration, and even improved gut health. Inspired by these findings, Ema decided to pursue her own path to greater beauty by seeking a simulated romance through an affair website.