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"Petit Flower" is a monthly shōjo manga magazine published by Shogakukan since 1978. It has been the primary platform for Moto Hagio's works since the 1980s. Hagio's notable series published in "Petit Flower" include "They Were Eleven" (1975), "Marginal" (1985), and "Heart of Thomas" (1986), showcasing her distinct narrative style and exploration of complex human relationships and emotions.