right time or way to express his feelings to her. After two months and several adventures with the girls, the Takanashi family come to accept him as a capable guardian for the sisters. They increase their financial support and give Yuuta shared title to his sister's big house in Ikebukuro allowing him and the girls to move out of his six-mat room apartment. Four years after his sister and brother-in-law go missing, Yuuta and Sora decide to marry. The eldest of the three half-sisters. She is 14 years old, a second-year middle school student, and has a tsundere personality. Notable for a strand of her neck length brown hair that curves forward and curls like a crescent. She has fairly good grades in school but is not adept at cooking. She has had a crush on Yuuta since they first met but starts out calling him "oji-san." When they become more comfortable with each other she starts referring to him as "onii-chan" even though they are not, strictly speaking, related. Since her first-year in junior high, Sora registers for the choir club to express her desire to sing. Yuuta is (perhaps purposefully) oblivious to her feelings. Sora does not like it when Yuuta pays attention to Raika as she is envious of both Raika's well-developed body and also her close relationship with Yuuta. Due to heavy responsibilities, Sora thought of resigning from her club, but with motivation from Kiyomi Okae the president, and Yuuta, Sora stays true to herself. In Volume 17, Sora begins her first-year in high school and earns top position of the choir club. She marries Yuuta during the events of volume 18. The second eldest of the three half-sisters. She is a 10-year-old fifth grader. She has blonde hair as her biological mother is part of Russian lineage. She normally refers to Yuuta as Oji-san. She has a preference for guys who are older than her and manly. It is implied that she may have a slight crush on Yuuta, as she is particularly curious about his love life. She went on a date with Kouichi once. In the light novels, Miu started developing feelings for Yuuta at the end of volume 4. Sasha also makes an appearance in volume 4 planning to rightfully take Miu back, but Miu decides to stay with Yuuta and her half-sisters. In Volume 17, she begins her first-year in junior