Ema, who has an American father, works at a cosmetics company, dedicating herself to developing products that enhance women's beauty. Due to her profession, she pays close attention to skincare and maintaining her figure, constantly refining her appearance. One day, she comes across a research paper with the intriguing title: "Do women become more beautiful when in love?" Struck by its argument that beauty arises not only from external efforts but also from inner emotional changes during romance, she decides to conduct a comparative study between women in relationships and those who aren't. Her findings reveal a surprising truth—love visibly improves skin texture, hydration, and even gut health, transforming beauty from the inside out. Inspired, Ema resolves to use an affair website to engage in a simulated romance, hoping to experience these beautifying effects firsthand.