 Shortly after the guy says Let her go referring to Ai, the scene returns   to Satohs bedroom where the Yakuza slashes the right side of her face with   a tanto knife to show whos the boss, explaining why later her face is   bandaged when she returns the ring to Ai.  The scene then goes back to the   lobby showing Ai running into the elevator scared.  Miyuki, who was waiting   for her, meets up with her after she gets out of the elevator.  Seeing her   terrified, Miyuki asks her what was wrong.  Ai shakes her head saying   everything was all right, its just he wasnt home thats all.  They then go   to the young clients room. 