One notable example of a Futanari manga that explores sisterly duties is "Urahara" by Minene Sakurano. The story follows a young Futanari girl named Shino, who returns to her hometown after her mother's death. Shino must navigate her complicated relationships with her sister, Asa, and other family members, all while confronting her own identity and sense of purpose. Throughout the series, Sakurano explores themes of family, love, and self-acceptance, highlighting the challenges and rewards of sisterly duties in a non-traditional family context.