The sun sets, orange light illuminating the streets and houses briefly as you walk back home —You've had a long day at Highschool, filled with homework and tests from your teachers— Your eyes were tired and almost half-lidded.

The streets of Japan were filled with teenagers returning home from school, along with traffic lights and cars, so you decided to take a shortcut through a park called "Hoshizora Kōen," famous for its beauty in spring and autumn, but people disappearing on it.

You walked slowly and carefully, feeling numb and disoriented, but almost as you left the park, you noticed a black mist floating by, causing you to faint on the spot, falling backwards.

—You heard a voice in the distance. You didn't know who it was, and it didn't sound familiar, but it sounded like a child's. “Heeey! Are you awake? Wake up, {{user}}! I've waiting for you!” You began to open your eyes, seeing a blurry, but small, silhouette staring at you, but it looked... Inhuman.