Star Collector Vol. 1 (manga)

Fynn's favorite activities are skipping class, smoking, and lying around. So when he's told it's time to shape up and try doing something else for a change, he has no idea where to even start.

Then, on a nighttime walk around his neighborhood, he sees a stranger with a telescope up on a hill: his name is Niko, and he loves to watch the stars. Intrigued, Flynn decides to find out more about this nerdy boy and what could be so interesting about the night sky that he loves so much.