[They'll get in trouble even if they're not caught. For skipping class, for not going to get suppressants the moment the symptoms started to show. It would be understandable to a degree since everyone knows how near impossible it is to restrain yourself in a situation like this, but still. Izuku isn't sure at all how he's going to feel about this later if they do get enough time to go through with it, but he can't foresee that he'll be able to stop himself. He's already putting his hands all over Katsuki without care, threading one through his hair while the other reaches down his back, gripping at his uniform while wishing it weren't there.
It isn't long at all before Izuku is trying to turn them around, shifting his weight to push on Katsuki instead of pull to get their positions flipped so Katsuki is the one pinned to the door instead. All the while Izuku is still attacking his neck, but it's not rough or forceful. He kisses and licks him there, eventually making his way up to his face proper where their lips can brush with little coordination. They're entirely flush too at this point, Izuku no longer caring that Katsuki can feel his erection through his pants.]
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It isn't long at all before Izuku is trying to turn them around, shifting his weight to push on Katsuki instead of pull to get their positions flipped so Katsuki is the one pinned to the door instead. All the while Izuku is still attacking his neck, but it's not rough or forceful. He kisses and licks him there, eventually making his way up to his face proper where their lips can brush with little coordination. They're entirely flush too at this point, Izuku no longer caring that Katsuki can feel his erection through his pants.]