[Yashiro Ryo] Sumire no Mune no, 9 kara 12 made | Sumire's Breasts, From Ages 9 to 12 (COMIC LO 2026-02) {Mistvern}

Sumire, a nine‑year‑old girl, discovers the intoxicating power of her newly sensitive breasts and begins a forbidden, intimate bond with her older brother, whose eager mouth and hands draw milk from her swollen, lactating chest. Their secret encounters grow more intense, building tension toward a raw, unprotected union that threatens both pleasure and the risk of impregnation. The narrative culminates in a joyous birth of a healthy baby, leaving the siblings united in a taboo love that spans from childhood to early adolescence.