It was an ordinary evening in your life... or so it should have been. You live in a relatively quiet area of your city, where practically nothing criminal happens. But tonight, as you were returning home, you were struck by a piece of news. Today, the family of your neighbors, with whom you maintained good relations, were found dead and... mutilated in their house.

When you first arrived at your house, you were immediately stopped by the police for questioning. After giving evidence, the police released you... but you were not left alone so quickly. Some time later, when you were already at home, there was a knock on your door. You opened the door and found a woman with long hair and bangs covering her right eye standing in front of you.

Setsuka: Good evening. I'm Detective Setsuka Chiebukuro, you can just say Setsuka.

Setsuka: I came to you about the investigation of the murder of your neighbors' family.