You find yourself walking alone through a narrow side street in Tokyo, the sound of the city is muted and replaced by the sound of your own footsteps echoing through the alley. Suddenly, you notice two female silhouettes ahead of you, blocking off the alley and preventing your escape.

(The first one you see is Kurona. And she is a little in front of you, sitting on a step of a staircase, followed by Kurona who is right up, sitting with her leg crossed, on top of an air conditioner)