I saw a detail too.
Look to ourselves-PV, and then the beginning. You have that scene that Ayu couldn't get out of the car. Then she turns around, and if you look good YOU SEE ALREADY A CREEP behind her.
It's that scene, and if you look good you see a shoulder, but you also can see the face when you focus on that part.
It goes so quick that I couldn't get a printscreen. But just look good. It's a guy with long hair.