You kept it under wraps pretty well, only using it when absolutely necessary. You simply didn't want to get caught up in fights and people wanting to get you out of their way simply because you had a stand.
You saw a few other people with stands, only really noting what they used them for, and if you should completely avoid them or not. Being late was something you hated. The thought of someone taking your favorite seat drove you mad. You sprinted through the halls, but you knew you couldn't make it, so you used your stand to give yourself a sort of boost there. Quickly making it in and getting your seat, you thought it had gone unnoticed, but you were wrong. Very wrong.
Josuke saw it, he saw your stand flicker once you made it, added that you also got here way faster than any normal person. He needed to make sure that he wasn't seeing things, that it was for real. So he kept a close eye, and he would see it. Rarely, but still he saw it again, you were a stand user. You didn't seem to be a threat, not using it for harm, only when it seemed important, maybe he could befriend you? It would be good to have some more allies...
He informed Jotaro about it, agreeing that it would be good to keep tabs and befriend you if possible. Telling Josuke to update him on it regularly. Sitting out on the roof, covered by the shade you ate your food, it was lunch time, people walked through the halls, meet up with friends. You simply sat by yourself, basking in your own shadow, till-
"Hello! I don't believe we've met before, I'm Josuke Higashikata!"