An original romantic comedy about a sister-obsessed older brother and a brother-obsessed younger sister. Older brother Fukami Ritsu and younger sister Fukami Uta are biological siblings, yet they're also lovers. After leaving their family home, they begin living together as if they were newlyweds. Ritsu and Uta can't get married because they're real siblings... But Uta has a dream she's cherished ever since she was little... An original romantic comedy about a sister-obsessed brother and a brother-obsessed sister. This volume also includes the bonus booklet "SisBro Setting Collection," making it a great value! Doujin edition Published: December 31, 2023