Sayuri, who lost her parents in an accident, raised her young siblings as a stripper. And her younger sister, Rinko, who knows her sister's hardships, suppresses her own will and lives as an honor student as her sister wants. However, when her marriage plan with Rinko breaks down, Sayuri and Rinko's true feelings clash. Rinko, who has lived without breaking her own shell, breaks up with her lover and fights with her sister, and begins to reexamine her own heart.