Sara Bihada, second daughter of the prestigious Bihada family, shares a fierce rivalry with her twin sister, Saki. She possesses natural beauty and a bright, colorful personality. Together, the twins carry their family's 300-year legacy as torchbearers in the World Beautiful-Skin Competition (WBC), an event aspiring to attract 3 billion women globally.

Sara's ambition drives her to reach the pinnacle of the skin beauty world, confronting powerful adversaries. Her journey is marked by intense competition and familial tension with Saki, a rivalry extending onto the WBC stage. Beyond the competition, Sara becomes entangled in a romance considered inappropriate by society or circumstance, leading to emotional turmoil, vulnerability, and tears. Her assertive and haughty demeanor surfaces in her signature challenge: "You think you can win over me with skin like that?"

The character originated in the original serial novel *Bihada Ichizoku*, which debuted on a mobile phone fashion website prior to its anime adaptation. Illustrated in a classic shojo manga style evoking 1970s aesthetics, Sara's portrayal in the novel fueled her popularity, sparking discussions across weblogs and online forums.