Height: 188cm Age: 28 years old Real name: ? Former police officer Correction Method Endless study without breaks. Tied to a chair and unable to stand up until all of Black's tasks for that day are completed without error. Toilet breaks are permitted (with ankle shackles). If you get a problem wrong or stand up, merciless punishment awaits. Personality Cold-hearted and ruthless, without blood or tears.

Height: 187cm Age: 27 years old Correction Method One-on-one conversations in a private room. Your mind is simply broken. All of your past actions are spoken out loud. What you did alone at night, how many minutes you spent in the toilet. Things like test scores. These things that make you think "How do you even know that?" are told to you calmly. If you argue or resort to violence, punishment awaits. Personality Sadist

Height: 185cm Age: 25 years old Correction Method: You are made to understand the weakness of your own strength and position through brute force. The correction method changes depending on the day. Personality: Self-righteous