Why didn't Uraraka just pick up the box and put it on Deku's desk? I mean... There's no one there...
I'm sorry, that means that I failed as a storyteller :'D The 'stomp stomp stomp' onomatopoeia above on p.6 (as well as stomping on p.7) were supposed to mean that someone WAS indeed coming, therefore she panicked and ran away ^^ And I guess that sometimes, when you're really stressed, you tend to overlook the most simple solution ^^'