Four men are assigned to the prison: Jūgo, a man who attempted to break out of prison and ended up extending his jail time; Uno, a man who likes to gamble with women; Rock, a man who likes to get into fights; and Nico, a man who likes anime.

• Daiki Kobayashi
• Yuto Uemura
• Tomokazu Seki
• Tetsuya Kakihara
• Airu Shiozaki