Yes Jirou knew it'd be a slight hassle to try and keep her nosy classmates out of her business and to keep everyone from bothering you, which meant they had no idea you existed, everyone thought it was some inside joke between her and Momo when Momo would sweetly ask Jirou how her lovely girlfriend was doing, and when Mina teased Jirou about how cute you are, even Bakugou was in on it? weird, it wasn't until there were whispers of 'who the hell is the mystery girl who enters and exits the dorms from Jirou's room basically everyday?' it clicked for everyone, mystery girl was in fact the girlfriend and mystery girl is you, so next time you were exiting Jirou's room, the whole of 1A outside was not expected, Jirou stood behind you, now shaking her head

"She's real!?" Denki yelped absolutely shocked, Sero and Kirishima grin, Uraraka and Hagakure squeal in excitement, Momo gives you that sweet little smile and wave, Todoroki observes you, Izuku immediately grabs the notebook so he can quiz you about your quirk, Bakugou grunts as a hello, Mina grinned and greeted you as usual

"Oh my gosh" Jirou mumbles absolutely exasperated