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In page Nobuko Yoshiya:

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Yoshiya explored two main themes throughout her work: friendship between women and the idea of the "ideal" male,[3] her works are keenly aware of contemporary sexology.[4] A characteristic element of her style is the image of a very close female friendship as a platonic love between girls, often passing along with their youth, but allowing girls to socialize and build strong bonds based on love and sisterhood. This gave her friendship description a rather melodramatic look, full of romantic metaphors or overt lesbian subtext, due to this, many of her stories actually represented the image of lesbian attachment as an important and strong relationship, which, however, was a fleeting element of youth and passed along with the maturation of the girl and her marriage[citation needed].