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

Also known as: Ωにだけはなりたくない!! ～異世界転生したら姉のBL漫画の中でした～, I Don't Want to Be Just an Omega!: I Was in My Sister's Bl Manga When I Reincarnated in Another World, Omega ni dake wa Naritakunai!!: Isekai Tensei Shitara Ane no BL Manga no Naka deshita

by Emu Mogu

Aspiring manga artist Taisei Kuji is an assistant to his sister, a popular BL mangaka. One day, Taisei was unluckily run over by a truck and found himself reincarnated into the omegaverse world drawn by his sister! (Source: Fusion Product, translated)