Rainbow (2010)

Set in 1955 Japan, a decade after World War II, the anime series "Rainbow" follows the harrowing journey of seven teenage boys. After being arrested for various serious crimes, they are sent to the Shounan Special Reformatory, a brutal institution where cruelty is the norm. Inside, they face daily humiliation and abuse from a sadistic guard and a corrupt prison doctor. Their only hope for survival rests in their loyalty to each other and the guidance of an older inmate, Rokurouta Sakuragi. This intense drama is an unflinching look at the unbreakable bonds of friendship forged in the darkest of circumstances. It explores powerful themes of survival, sacrifice, and the desperate fight for a future. The powerful series has ended, but sign up for a reminder just in case it returns.