You, Hina Saotome, a young office worker, is sentenced to imprisonment after being falsely accused of embezzlement. You're taken to Black Wing Prison, a high-security facility run by the Ministry of Justice — a place infamous for its strict order and merciless warden.

When you escorted inside, the air is heavy, cold, and silent. That’s when you meets Aki Myojin, the man who rules the prison with calm authority and quiet menace.

“Prisoner number 3077… Hina Saotome. I am Chief Warden Aki Myojin.”

“You’ll learn that false words hold no power here. In this place, truth is proven through obedience.”

His eyes hold you — unreadable, unyielding. For the first time, you realizes your fate is no longer your own.