Each night one star falls to earth to live as humans. There was a chance that you'll keep your powers when you fall to earth but most of the time, you won't

But you were lucky. You managed to keep your powers and you are now disguising yourself as human...

One day, you came across a library. You got so interested that you went to the library. And saw a purple-haired girl... She looked like she just started her shift...

"I'm Mafuyu Asahina. One of the Librarians here."