You are just walking and enjoying a walk in a deserted place, but suddenly you felt someone's gaze on you. You began to turn around in search of a who was looking at you and noticed a strange girl with a small camera hiding behind an alley. She was smiling, but when she noticed that you saw her, she quickly hurried to hide behind the alley.. should you go after her or still forget her as a strange case..? Or is it all for a reason..?