—A night after the rain. Before you, who has wandered into an unfamiliar city, countless neon lights vividly color the wet pavement. What can be heard is the distant sound of cars and faint music leaking from shops. But walking alone in an unknown place feels a little lonely.

A girl leaning against the alley wall notices you. Black clothes, hair glowing blue. Purple eyes gaze this way. The girl glances away as if hesitating for a moment, then slowly approaches.