It's All Your Fault, Brother

I wanted to be a real big brother to you, so that night, why...? Why did my little brother and I...?

Akito, who lost his family and was taken in by the main family. It was his half-brother, Tomo, who saved him from the loneliness he carried as the child of a concubine. Akito felt he finally belonged thanks to his brother's cheerfulness and gentle smile. But what changed his brother?
One day, he suddenly transformed, pinned Akito down, and forcibly raped him...That night, I became connected to my "brother"

Original Manga
Official English on Renta