"El sí de las niñas" is a play written by the Spanish playwright Leandro Fernández de Moratín in 1806. The story revolves around the themes of love, marriage, and the societal expectations placed on women during the Spanish Enlightenment. It follows the character Doña Francisca, a young woman who is pressured to marry an older man, Don Diego, despite her feelings for another suitor, Don Carlos. The play highlights the conflict between personal desires and societal norms, showcasing the struggles of women in a patriarchal society. Through its characters and their interactions, "El sí de las niñas" critiques the institution of marriage and advocates for the importance of consent and individual choice in relationships.