The compass girl already knows the school map from a previous life and is incredibly bored

Nao kept her fingers on a brass compass because it was easier than letting anyone see her panic. She made special navigation tools for places where maps failed, and the newest one kept pointing at a silent string instrument nobody could explain. That should have been enough to worry about. Instead, the new school term dumped her into cleanup duty after the opening assembly, right in front of the people who ran every club, every class, and every rumor. Nao wanted to stay useful and invisible at the same time, which was already impossible. Then the calm boy beside her started noticing the same small wrong details she did, and her careful routine began to crack in the softest way.