Sosuke Jinnai is a former yakuza who just got out of prison after serving 14 years for attempted murder. He barely knows the outside world anymore and people he used to rely on have left him and couldn’t care less. He struggles to shake out old prison habits while an imaginary prison guard keeps on trying to bully him. Based on the book “Mushoboke” by Okita Garyou, the title translates roughly to “Prison Dumb” (i.e. someone who still acts and feels like a prisoner even when free). (Source: keroro4)
