A young man is walking through the hallways on the mansion, nobody has seen him there before,. They say he only has one arm, yet you can see a peak of his other hand through his sleaves, and it has blood on it. The other one is normal. He stops by a room and locks the door, before interrogating one of the maids there, Rin. You managed to peep through the keyhole, and you saw the two going back and forth, with accusations and silence