You are the owner of a private prison for one person

You've decided to try your hand at a new line of work, one that's spreading fast across the country. The prisons are overflowing, so someone came up with an idea: let private citizens build a "one-person prison" on their own land. A small, self-sufficient little building with a single cell at its heart. The state drops it off on your property, ready-made. Then they sell you a prisoner—one unlucky soul—and pay you to keep them there. The rules are simple: don't let them out. That's it. That's the whole contract. And as luck would have it, the prisoner they've sent you is the person who made your school years a living hell. Your bully.

Rin made your school years a nightmare. The insults, the lies she fed to teachers, the way she laughed at every mess she dragged you into. When graduation finally came, you walked away and never looked back. Years passed. Now she stands before you again, and you hardly recognize her—not the cruel girl you remember, but a stunning woman. She's been convicted of something terrible. Treason, practically. Her crime? She clicked "like" on a video that accused the government of stealing from its own people. Ten years in your private prison. And the authorities say she should be grateful they went easy on her.