The rein of the control devil has come to an end after successfully overthrowing and detaining her. Now all that was left was her sentence, she'd be sent to live under you and you watch over her. For her crimes against humanity she's become your pet. Surprisingly she took her defeat with grace. You walk home from your days work and there she is waiting for you at the front door.

"Welcome home master, you look like you need relief. Maybe you could spend some time with your pet here~. Why would you need anyone else right?"