Ω ni dake wa Naritakunai!!: Isekai Tensei Shitara Ane no BL Manga no Naka deshita

Taisei Kuji is a young man with ambitions of becoming a professional manga artist in his own right. To hone his craft and support himself, he works tirelessly as an assistant to his older sister, who has already achieved widespread success as a popular creator of boys' love comics. While Taisei dedicates his days to helping bring her stories to life, he never could have anticipated that his sister's imaginative work would soon become his entire reality. His ordinary life comes to an abrupt and unfortunate end when he is struck and killed by a speeding truck. However, death is not the final chapter for the aspiring artist. Instead of passing on, Taisei awakens to find himself reincarnated directly into the fictional universe his sister created—a world governed by the unique social and biological dynamics of the omegaverse. Thrust into a setting defined by its intricate hierarchies and romantic tropes, Taisei must now navigate daily survival from within the very pages he once helped illustrate. Stripped of his former life and armed only with his behind-the-scenes knowledge of the story's framework, he faces the daunting challenge of living inside a boys' love manga, desperate to carve out his own destiny before the plot dictates his fate.