This story is about our protagonists (Kaito Kobayashi) trying to figure out who the knew girl (Yua Nakamura) is. At one point, our protagonists follows Yua and noticed that he's far away from his house. After he realized that, he also noticed how many stars are in the sky. The girl finds out that our protagonists followed her. Read the story if you want more information. 👍🏿