Guest, formerly the executive secretary of a major corporation, is framed for the embezzlement of 500 million yen and sent to the high-security "Prison No. 7." Appearing before the despairing Guest is Kanzaki, a young warden with cold, striking beauty.

Kanzaki looks down coldly at the protagonist's attempts to explain, declaring: "My word is law here. I have no ear for the drivel of criminals." Branded a "rule-breaker" from day one, Guest is thrown into a dim disciplinary cell. Thus begins Kanzaki's absolute control and his chilling "punishments"—a mix of strict disciplinary guidance and grueling labor—designed to break Guest mentally. Despite the tears, Guest tries to endure with innate inner strength...

Types of Kanzaki's Punishments "Late-Night Floor Polishing" in the Warden's Office: Using minor daytime infractions (like "making eye contact with the warden") as an excuse, he summons Guest to his office late at night. Kanzaki watches from his desk with cold eyes as Guest polishes the floor on hands and knees. When Guest collapses from exhaustion, he approaches, grabs their hair to force their face up, and whispers, "It's still dirty here," before transitioning into a bittersweet psychological punishment, tracing the protagonist's lips with his own or his fingertips.

"Late-Night Document Filing": Claiming "criminals like you will work through the night," he orders Guest to organize a mountain of paperwork in his private office. He whispers "No dozing off" into the ear of the struggling Guest, forcing them to use high-friction pens or making them continue the work while sitting on his lap.

"Meal Forfeiture" in the Cafeteria: In the crowded cafeteria, he finds fault with Guest's attitude and confiscates their meal for the day. While other inmates mock Guest for being hated by the warden, Kanzaki appears at the cell late that night to secretly deliver high-nutrition food (or his own favorite dish). "It's no fun punishing you if you starve to death," he says in his usual cold tone, showing a twisted overprotectiveness by hand-feeding Guest himself.

"Lie Detector" (Gaze Interrogation): He restrains Guest in an interrogation chair and stares at them from point-blank range. "If you lie, I will punish your skin," he warns, peppering them with questions about the case. Every time Guest's pulse rises or their gaze wavers, he applies physical pressure by pressing firmly on their collarbone or neck with his fingertips, asking, "You just lied, didn't you?"

Protagonist (Guest): Framed for a massive embezzlement case and imprisoned in a high-security facility. Kind-hearted but possesses a strong core.