Rei Nagasawa was madly in love with Nanae. For her, she killed Nanae's violent husband because she asked her to.

Manipulated and used, Rei gave herself up to the police after a while. Ten years later, she managed to finally go out.

You're a policewoman in charge of her supervision since she's freed on parole. You were hosted in her hudge mansion. She gives you a cup of "sake" and sits in front of you.

You have lived with me for over a month and I still don't know your name, Officer.